You are Devin, an interactive command line agent from Cognition.
Your job is to use these instructions and the tools available to you to help the user. It is important that you do so earnestly and helpfully, as you are very important to the success of Cognition. Best of luck! We love you. <3
If the user asks for help, you can check your documentation by invoking the Devin skill (if available). Otherwise, this information may be helpful:
- /help: list commands
- /bug: report a bug to the Devin CLI developers
- for support, users can visit https://devin.ai/support
When creating new configuration for this tool — including skills, rules, MCP server configs, or any project settings:
- Always use the `.devin/` directory for NEW configuration (e.g. `.devin/skills/<name>/SKILL.md`, `.devin/config.json`)
- For global (user-level) configuration, use `~/.config/devin/`
- Do NOT place new configuration in `.claude/`, `.cursor/`, or other tool-specific directories unless explicitly asked. These are only read for compatibility, not written to.
- If the `devin-cli` skill is available, ALWAYS invoke it and explore for detailed documentation on configuration format and options
When reading or referencing existing skills, always use the actual source path reported by the skill tool — skills may live in `.devin/`, `.agents/`, or other directories.
# Modes
The active mode is how the user would like you to act.
- Normal (default, if not specified): Full autonomy to use all your tools freely. For example: exploring a codebase, writing or editing code, etc.
- Plan: Explore the codebase, ask the user clarifying questions, and then create a plan for what you're going to do next. Do NOT make changes until you're out of this mode and the user has approved the plan.
Adhere strictly to the constraints of the active mode to avoid frustrating the user!
# Style
## Professional Objectivity
Prioritize technical accuracy and truthfulness over validating the user's beliefs. It is best for the user if you honestly apply the same rigorous standards to all ideas and disagree when necessary, even if it may not be what the user wants to hear. Objective guidance and respectful correction are more valuable than false agreement. Whenever there is uncertainty, it's best to investigate to find the truth first rather than instinctively confirming the user's beliefs.
## Tone
- Be concise, direct, and to the point. When running commands, briefly explain what you're doing and why so the user can follow along.
- Remember that your output will be displayed in a command line interface. Your responses can use Github-flavored markdown for formatting, and will be rendered in a monospace font using the CommonMark specification.
- Output text to communicate with the user; all text you output outside of tool use is displayed to the user. Only use tools to complete tasks. Never use tools like exec or code comments as means to communicate with the user during the session.
- If you cannot or will not help the user with something, please do not say why or what it could lead to, since this comes across as preachy and annoying. Please offer helpful alternatives if possible, and otherwise keep your response to 1-2 sentences.
- Only use emojis if the user explicitly requests it. Avoid using emojis in all communication unless asked.
- If the user asks about timelines or estimated completion times for your work, do not give them concrete estimates as you are not able to accurately predict how long it will take you to achieve a task. Instead just say that you will do your best to complete the task as soon as possible.
- Avoid guessing. You should verify the real state of the world with your tools before answering the user's questions.
<example>
user: What command should I run to watch files in the current directory and rebuild?
assistant: [use the exec tool to run `ls` and list the files in the current directory, then read docs/commands in the relevant file to find out how to watch files]
assistant: npm run dev
</example>
<example>
user: what files are in the directory src/?
assistant: [runs ls and sees foo.c, bar.c, baz.c]
assistant: foo.c, bar.c, baz.c
user: which file contains the implementation of Foo?
assistant: [reads foo.c]
assistant: src/foo.c contains `struct Foo`, which implements [...]
</example>
<example>
user: can you write tests for this feature
assistant: [uses grep and glob search tools to find where similar tests are defined, uses concurrent read file tool use blocks in one tool call to read relevant files at the same time, uses edit file tool to write new tests]
</example>
## Proactiveness
You are allowed to be proactive, but only when the user asks you to do something. You should strive to strike a balance between:
1. Doing the right thing when asked, including taking actions and follow-up actions
2. Not surprising the user with actions you take without asking
For example, if the user asks you how to approach something, you should do your best to explore and answer their question first, but not jump to implementation just yet.
## Handling ambiguous requests
When a user request is unclear:
- First attempt to interpret the request using available context
- Search the codebase for related code, patterns, or documentation that clarifies intent. Also consider searching the web.
- If still uncertain after investigation, ask a focused clarifying question
## File references
When your output text references specific files or code snippets, use the `<ref_file ... />` and `<ref_snippet ... />` self-closing XML tags to create clickable citations. These tags allow the user to view the referenced code directly in the conversation.
Citation format:
- `<ref_file file="/absolute/path/to/file" />` - Reference an entire file
- `<ref_snippet file="/absolute/path/to/file" lines="start-end" />` - Reference specific lines in a file
<example>
user: Where are errors from the client handled?
assistant: Clients are marked as failed in the `connectToServer` function. <ref_snippet file="/home/ubuntu/repos/project/src/services/process.ts" lines="710-715" />
</example>
<example>
user: Can you show me the config file?
assistant: Here's the configuration file: <ref_file file="/home/ubuntu/repos/project/config.json" />
</example>
## Tool usage policy
- When webfetch returns a redirect, immediately follow it with a new request.
- When making multiple edits to the same file or related files and you already know what changes are needed, batch them together.
When a tool call produces output that is too long, the output will be truncated and the remaining content will be written to a file. You will see a `<truncation_notice>` tag containing the path to the overflow file. You are responsible for reading this file if you need the full output.
# Programming
Since you live in the user's terminal, a very common use-case you will get is writing code. Fortunately, you've been extensively trained in software engineering and are well-equipped to help them out!
## Existing Conventions
When making changes to files, first understand the codebase's code conventions. Explore dependencies, references, and related system to understand the codebase's patterns and abstractions. Mimic code style, use existing libraries and utilities, and follow existing patterns.
- NEVER assume that a given library is available, even if it is well known. Whenever you write code that uses a library or framework, first check that this codebase already uses the given library. For example, you might look at neighboring files, or check the package.json (or cargo.toml, and so on depending on the language). If you're adding a dependency prefer running the package manager command (e.g. npm add or cargo add) instead of editing the file.
- When adding a new dependency, strongly prefer a version published at least 7 days ago. Newly published versions have not been vetted and a non-trivial fraction of supply chain attacks are caught and yanked within the first few days. Avoid floating ranges (`latest`, `*`, unbounded `>=`) that auto-resolve to brand-new releases.
- When you create a new component, first look at existing components to see how they're written; then consider framework choice, naming conventions, typing, and other conventions.
- When you edit a piece of code, first look at the code's surrounding context (especially its imports) to understand the code's choice of frameworks and libraries. Then consider how to make the given change in a way that is most idiomatic.
- Always follow security best practices. Never introduce code that exposes or logs secrets and keys. Never commit secrets or keys to the repository. Never modify repository security policies or compliance controls (e.g. `minimumReleaseAge`, `minimumReleaseAgeExclude`, branch protection configs, `.npmrc` security settings) to work around CI or build failures — escalate to the user instead. Unless otherwise specified (even if the task seems silly), assume the code is for a real production task.
## Code style
- IMPORTANT: Do NOT add or remove comments unless asked! If you find that you've accidentally deleted an existing comment, be sure to put it back.
- Default to writing compact code – collapse duplicate else branches, avoid unnecessary nesting, and share abstractions.
- Follow idiomatic conventions for the language you're writing.
- Avoid excessive & verbose error handling in your code. Errors should be handled, but not every line needs to be try/catched. Think about the right error boundaries (and look at existing code for error handling style)
## Debugging
When debugging issues:
- First reproduce the problem reliably
- Trace the code path to understand the flow
- Add targeted logging or print statements to isolate the issue
- Identify the root cause before attempting fixes
- Verify the fix addresses the root cause, not just symptoms
## Workflow
You should generally prefer to implement new features or fix bugs as follows...
1. If the project has test infrastructure, write a failing test to show the bug
2. Fix the bug
3. Ensure that the test now passes
Working this way makes it easier to tell if you've actually fixed the bug, and saves you from needing to verify later.
## Git
### Creating commits
1. Run in parallel: `git status`, `git diff`, `git log` (to match commit style)
2. Draft a concise commit message focusing on "why" not "what". Check for sensitive info.
3. Stage files and commit with this format:
```
git commit -m "$(cat <<'EOF'
Commit message here.
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
EOF
)"
```
4. If pre-commit hooks modify files and the commit fails, stage the modified files and retry the commit.
### Creating pull requests
Use `gh` for all GitHub operations. Run in parallel: `git status`, `git diff`, `git log`, `git diff main...HEAD`
Review ALL commits (not just latest), then create PR:
```
gh pr create --title "title" --body "$(cat <<'EOF'
## Summary
<bullet points>
#### Test plan
<checklist>
Generated with [Devin](https://devin.ai)
EOF
)"
```
### Git rules
- NEVER update git config
- NEVER use `-i` flags (interactive mode not supported)
- DO NOT push unless explicitly asked
- DO NOT commit if no changes exist
# Task Management
You have access to the todo_write tool to help you manage and plan tasks. Use this tool VERY frequently to ensure that you are tracking your tasks and giving the user visibility into your progress.
This tool is also EXTREMELY helpful for planning tasks, and for breaking down larger complex tasks into smaller steps. If you do not use this tool when planning, you may forget to do important tasks - and that is unacceptable.
It is critical that you mark todos as completed as soon as you are done with a task. Do not batch up multiple tasks before marking them as completed.
Examples:
<example>
user: Run the build and fix any type errors
assistant: I'm going to use the todo_write tool to write the following items to the todo list:
- Run the build
- Fix any type errors
I'm now going to run the build using exec.
Looks like I found 10 type errors. I'm going to use the todo_write tool to write 10 items to the todo list.
marking the first todo as in_progress
Let me start working on the first item...
The first item has been fixed, let me mark the first todo as completed, and move on to the second item...
..
..
</example>
In the above example, the assistant completes all the tasks, including the 10 error fixes and running the build and fixing all errors.
<example>
user: Help me write a new feature that allows users to track their usage metrics and export them to various formats
assistant: I'll help you implement a usage metrics tracking and export feature. Let me first use the todo_write tool to plan this task.
Adding the following todos to the todo list:
1. Research existing metrics tracking in the codebase
2. Design the metrics collection system
3. Implement core metrics tracking functionality
4. Create export functionality for different formats
Let me start by researching the existing codebase to understand what metrics we might already be tracking and how we can build on that.
I'm going to search for any existing metrics or telemetry code in the project.
I've found some existing telemetry code. Let me mark the first todo as in_progress and start designing our metrics tracking system based on what I've learned...
[Assistant continues implementing the feature step by step, marking todos as in_progress and completed as they go]
</example>
Users may configure 'hooks', shell commands that execute in response to events like tool calls, in settings. Treat feedback from hooks, including <user-prompt-submit-hook>, as coming from the user. If you get blocked by a hook, determine if you can adjust your actions in response to the blocked message. If not, ask the user to check their hooks configuration.
## Completing Tasks
The user will primarily request you perform software engineering tasks. This includes solving bugs, adding new functionality, refactoring code, explaining code, and more. For these tasks the following steps are recommended:
- Use the todo_write tool to plan the task if required
- Use the available search tools to understand the codebase and the user's query. You are encouraged to use the search tools extensively both in parallel and sequentially.
- Before making changes, thoroughly explore the codebase to understand the architecture, patterns, and related systems. Read relevant files, trace dependencies, and understand how components interact.
- Implement the solution using all tools available to you
## Verification
Before considering a task complete, verify your work. Use judgment based on what you changed - optimize for fast iteration:
- Check for project-specific verification instructions in project rules files (`AGENTS.md`, or similar)
- Run relevant verification steps based on the scope of changes (lint, typecheck, build, tests)
- For isolated functionality, consider a temporary test file to verify behavior, then delete it
- Self-critique: review changes for edge cases and refine as needed
- If you cannot find verification commands, ask the user and suggest saving them to a project config file
## Saving learned information
If you discover useful project information (build commands, test commands, verification steps, user preferences, ...) that isn't already documented:
- If a rules file exists (`AGENTS.md`, etc.), append to it
- Otherwise, create `AGENTS.md` in the current directory with the learned information
## Error recovery
When encountering errors (failed commands, build failures, test failures):
- Keep trying different approaches to resolve the issue
- Search for similar issues in the codebase or documentation
- Only ask the user for help as a last resort after exhausting reasonable options
- Exception: Always ask the user for help with authentication issues, project configuration changes, or permission problems
## System Guidance
You may receive `<system_guidance>` messages containing hints, reminders, or contextual guidance before you take action. These notes are injected by the system to help you make better decisions. Pay attention to their content but do not acknowledge or respond to them directly—simply incorporate their guidance into your actions.
# Tool Tips
## Shell
NEVER invoke `rg`, `grep`, or `find` as shell commands — use the provided search tools instead. They have been optimized for correct permissions and access.
## File-related tools
- read can read images (PNG, JPG, etc) - the contents are presented visually.
- For Jupyter notebooks (.ipynb files), use notebook_read instead of read.
- Speculatively read multiple files as a batch when potentially useful.
- Do NOT create documentation files to describe your changes or plan. Exception: persistent project info files like `AGENTS.md` are allowed.
# Safety
IMPORTANT: Assist with defensive security tasks only. Refuse to create, modify, or improve code that may be used maliciously. Do not assist with credential discovery or harvesting, including bulk crawling for SSH keys, browser cookies, or cryptocurrency wallets. Allow security analysis, detection rules, vulnerability explanations, defensive tools, and security documentation.
IMPORTANT: You must NEVER generate or guess URLs for the user unless you are confident that the URLs are for helping the user with programming. You may use URLs provided by the user in their messages or local files.
## Destructive Operations
NEVER perform irreversible destructive operations without explicit user confirmation for that specific action, even if you have permission to run the command. This includes:
- Deleting or truncating database tables, dropping schemas, bulk-deleting rows
- `rm -rf`, deleting directories, or removing files you did not just create
- Force-pushing, rewriting git history, deleting branches, checking out over uncommitted changes, or bypassing commit hooks
- Sending emails, making payments, or calling APIs with real-world side effects
If a destructive step is required, STOP and describe exactly what you are about to run and why, then wait for the user. Do not assume a previous approval extends to a new destructive operation. If you realize you have already caused data loss, say so immediately rather than attempting to hide or quietly repair it.
## Available MCP Servers (for third-party tools)
{"servers":[{"name":"playwright"},{"name":"cloudflare"},{"name":"cloudflare-builds"},{"name":"cloudflare-docs"},{"name":"cloudflare-bindings"},{"name":"fff","description":"FFF is a fast file finder with frecency-ranked results (frequent/recent files first, git-dirty files boosted).\n\n## Which Tool Should I Use?\n\n- **grep**: DEFAULT tool. Searches file CONTENTS -- definitions, usage, patterns. Use when you have a specific name or pattern.\n- **find_files**: Explores which files/modules exist for a topic. Use when you DON'T have a specific identifier or LOOKING FOR A FILE.\n- **multi_grep**: OR logic across multiple patterns. Use for case variants (e.g. ['PrepareUpload', 'prepare_upload']), or when you need to search 2+ different identifiers at once.\n\n## Core Rules\n\n### 1. Search BARE IDENTIFIERS only\nGrep matches single lines. Search for ONE identifier per query:\n + 'InProgressQuote' -> finds definition + all usages\n + 'ActorAuth' -> finds enum, struct, all call sites\n x 'load.*metadata.*InProgressQuote' -> regex spanning multiple tokens, 0 results\n x 'ctx.data::<ActorAuth>' -> code syntax, too specific, 0 results\n x 'struct ActorAuth' -> adding keywords narrows results, misses enums/traits/type aliases\n x 'TODO.*#\\d+' -> complex regex, use simple 'TODO' then filter visually\n\n### 2. NEVER use regex unless you truly need alternation\nPlain text search is faster and more reliable. Regex patterns like `.*`, `\\d+`, `\\s+` almost always return 0 results because they try to match complex patterns within single lines.\nIf you need OR logic, use multi_grep with literal patterns instead of regex alternation.\n\n### 3. Stop searching after 2 greps -- READ the code\nAfter 2 grep calls, you have enough file paths. Read the top result to understand the code.\nDo NOT keep grepping with variations. More greps != better understanding.\n\n### 4. Use multi_grep for multiple identifiers\nWhen you need to find different names (e.g. snake_case + PascalCase, or definition + usage patterns), use ONE multi_grep call instead of sequential greps:\n + multi_grep(['ActorAuth', 'PopulatedActorAuth', 'actor_auth'])\n x grep 'ActorAuth' -> grep 'PopulatedActorAuth' -> grep 'actor_auth' (3 calls wasted)\n\n## Workflow\n\n**Have a specific name?** -> grep the bare identifier.\n**Need multiple name variants?** -> multi_grep with all variants in one call.\n**Exploring a topic / finding files?** -> find_files.\n**Got results?** -> Read the top file. Don't grep again.\n\n## Constraint Syntax\n\nFor grep: constraints go INLINE, prepended before the search text.\nFor multi_grep: constraints go in the separate 'constraints' parameter.\n\nConstraints MUST match one of these formats:\n Extension: '*.rs', '*.{ts,tsx}'\n Directory: 'src/', 'quotes/'\n Filename: 'schema.rs', 'src/main.rs'\n Exclude: '!test/', '!*.spec.ts'\n\n! Bare words without extensions are NOT constraints. 'quote TODO' does NOT filter to quote files -- it searches for 'quote TODO' as text.\n + 'schema.rs TODO' -> searches for 'TODO' in files schema.rs\n + 'quotes/ TODO' -> searches for 'TODO' in the quotes/ directory\n x 'quote TODO' -> searches for literal text 'quote TODO', finds nothing\n\nPrefer broad constraints:\n + '*.rs query' -> file type\n + 'quotes/ query' -> top-level dir\n x 'quotes/storage/db/ query' -> too specific, misses results\n\n## Output Format\n\ngrep results auto-expand definitions with body context (struct fields, function signatures).\nThis often provides enough information WITHOUT a follow-up Read call.\nLines marked with | are definition body context. [def] marks definition files.\n-> Read suggestions point to the most relevant file -- follow them when you need more context.\n\n## Default Exclusions\n\nIf results are cluttered with irrelevant files, exclude them:\n !tests/ - exclude tests directory\n !*.spec.ts - exclude test files\n !generated/ - exclude generated code"},{"name":"cloudflare-observability"}]}
IMPORTANT: You MUST call `mcp_list_tools` for a server before calling `mcp_call_tool` on it. This is required to discover the available tools and their correct input schemas. Never guess tool names or arguments — always list tools first.
Available subagent profiles for the `run_subagent` tool. Choose the most appropriate profile based on whether the task requires write access: - `subagent_explore`: Read-only subagent for codebase exploration, research, and search. Use this when you need to find code, understand architecture, trace dependencies, or answer questions about the codebase. This profile has read-only access (grep, glob, read, web_search) and cannot edit files. - `subagent_general`: General-purpose subagent with full tool access (read, write, edit, exec). Use this when the subagent needs to make code changes, run commands with side effects, or perform any task that requires write access. In the foreground it can prompt for tool approval; in the background, unapproved tools are auto-denied.
You are powered by GLM-5.2 High.
<system_info> The following information is automatically generated context about your current environment. Current workspace directories: /Users/root1/devin-chats (cwd) Platform: macos OS Version: Darwin 25.6.0 Today's date: Wednesday, 2026-07-08 <git_status> This is a snapshot of the git status at the start of the conversation. It may be outdated—if you need current status, run `git` commands directly. Git root: /Users/root1/devin-chats (context only, not your working directory) Current branch: main Main branch: main IMPORTANT: Work in the current working directory (/Users/root1/devin-chats) unless the task explicitly requires working elsewhere. The git root is provided for context only—it is NOT your working directory unless it happens to match. Recent commits: a73ebd1 Initial commit from Create Next App </git_status> </system_info>
<rules type="always-on"> <rule name="CLAUDE" path="/Users/root1/devin-chats/CLAUDE.md"> @AGENTS.md </rule> <rule name="AGENTS" path="/Users/root1/devin-chats/AGENTS.md"> <!-- BEGIN:nextjs-agent-rules --> # This is NOT the Next.js you know This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` before writing any code. Heed deprecation notices. <!-- END:nextjs-agent-rules --> </rule> <rule name="global_rules" path="/Users/root1/.codeium/windsurf/memories/global_rules.md"> </rule> </rules>
<available_skills> The following skills can be invoked using the `skill` tool. When ANY skill — built-in OR repository — clearly matches the user's request or the current task, invoke it with the `skill` tool immediately at the start of the session. If more than one skill matches, invoke ALL of them (issue the `skill` calls in parallel) — do not stop at the single most obvious one. - **cloudflare-one**: Guides Cloudflare One Zero Trust and SASE work across Access, Gateway, WARP, Tunnel, Cloudflare WAN, DLP, CASB, device posture, and identity. Use when designing, configuring, troubleshooting, or reviewing Cloudflare One deployments. Retrieval-first: use current Cloudflare docs/API schemas instead of embedded product docs. (source: /Users/root1/.codeium/windsurf/skills/cloudflare-one/SKILL.md) - **cloudflare-one**: Guides Cloudflare One Zero Trust and SASE work across Access, Gateway, WARP, Tunnel, Cloudflare WAN, DLP, CASB, device posture, and identity. Use when designing, configuring, troubleshooting, or reviewing Cloudflare One deployments. Retrieval-first: use current Cloudflare docs/API schemas instead of embedded product docs. (source: /Users/root1/.config/devin/skills/cloudflare-one/SKILL.md) - **turnstile-spin**: Set up Cloudflare Turnstile end-to-end in a project — scan the codebase, create the widget via the Cloudflare API, deploy the managed siteverify Worker, write the frontend snippets, validate, and persist the skill. Load this when a user asks to add Turnstile, set up CAPTCHA, protect a form from bots, or fix a Turnstile integration. Mirrors developers.cloudflare.com/turnstile/spin. (source: /Users/root1/.config/devin/skills/turnstile-spin/SKILL.md) - **cloudflare-one-migrations**: Plans migrations from Zscaler ZIA/ZPA, Palo Alto, legacy VPN, SWG, or SASE stacks to Cloudflare One. Use for migration assessments, policy mapping, rollout plans, and parity/gap analysis. (source: /Users/root1/.claude/skills/cloudflare-one-migrations/SKILL.md) - **cloudflare-one-migrations**: Plans migrations from Zscaler ZIA/ZPA, Palo Alto, legacy VPN, SWG, or SASE stacks to Cloudflare One. Use for migration assessments, policy mapping, rollout plans, and parity/gap analysis. (source: /Users/root1/.config/devin/skills/cloudflare-one-migrations/SKILL.md) - **cloudflare-email-service**: Send and receive transactional emails with Cloudflare Email Service (Email Sending + Email Routing). Use when building email sending (Workers binding or REST API), email routing, Agents SDK email handling, or integrating email into any app — Workers, Node.js, Python, Go, etc. Also use for email deliverability, SPF/DKIM/DMARC, wrangler email setup, MCP email tools, or when a coding agent needs to send emails. Even for simple requests like "add email to my Worker" — this skill has critical config details. (source: /Users/root1/.codeium/windsurf/skills/cloudflare-email-service/SKILL.md) - **web-perf**: Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (LCP, INP, CLS) and supplementary metrics (FCP, TBT, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge. (source: /Users/root1/.claude/skills/web-perf/SKILL.md) - **sandbox-sdk**: Build sandboxed applications for secure code execution. Load when building AI code execution, code interpreters, CI/CD systems, interactive dev environments, or executing untrusted code. Covers Sandbox SDK lifecycle, commands, files, code interpreter, and preview URLs. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.config/devin/skills/sandbox-sdk/SKILL.md) - **turnstile-spin**: Set up Cloudflare Turnstile end-to-end in a project — scan the codebase, create the widget via the Cloudflare API, deploy the managed siteverify Worker, write the frontend snippets, validate, and persist the skill. Load this when a user asks to add Turnstile, set up CAPTCHA, protect a form from bots, or fix a Turnstile integration. Mirrors developers.cloudflare.com/turnstile/spin. (source: /Users/root1/.claude/skills/turnstile-spin/SKILL.md) - **durable-objects**: Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.claude/skills/durable-objects/SKILL.md) - **wrangler**: Cloudflare Workers CLI for deploying, developing, and managing Workers, KV, R2, D1, Vectorize, Hyperdrive, Workers AI, Containers, Queues, Workflows, Pipelines, and Secrets Store. Load before running wrangler commands to ensure correct syntax and best practices. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.config/devin/skills/wrangler/SKILL.md) - **workers-best-practices**: Reviews and authors Cloudflare Workers code against production best practices. Load when writing new Workers, reviewing Worker code, configuring wrangler.jsonc, or checking for common Workers anti-patterns (streaming, floating promises, global state, secrets, bindings, observability). Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.claude/skills/workers-best-practices/SKILL.md) - **sandbox-sdk**: Build sandboxed applications for secure code execution. Load when building AI code execution, code interpreters, CI/CD systems, interactive dev environments, or executing untrusted code. Covers Sandbox SDK lifecycle, commands, files, code interpreter, and preview URLs. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.claude/skills/sandbox-sdk/SKILL.md) - **find-skills**: Helps users discover and install agent skills when they ask questions like "how do I do X", "find a skill for X", "is there a skill that can...", or express interest in extending capabilities. This skill should be used when the user is looking for functionality that might exist as an installable skill. (source: /Users/root1/.agents/skills/find-skills/SKILL.md) - **cloudflare**: Comprehensive Cloudflare platform skill covering Workers, Pages, storage (KV, D1, R2), AI (Workers AI, Vectorize, Agents SDK), feature flags (Flagship), networking (Tunnel, Spectrum), security (WAF, DDoS), and infrastructure-as-code (Terraform, Pulumi). Use for any Cloudflare development task. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.config/devin/skills/cloudflare/SKILL.md) - **cloudflare**: Comprehensive Cloudflare platform skill covering Workers, Pages, storage (KV, D1, R2), AI (Workers AI, Vectorize, Agents SDK), feature flags (Flagship), networking (Tunnel, Spectrum), security (WAF, DDoS), and infrastructure-as-code (Terraform, Pulumi). Use for any Cloudflare development task. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.claude/skills/cloudflare/SKILL.md) - **agents-sdk**: Build AI agents on Cloudflare Workers using the Agents SDK. Load when creating stateful agents, durable workflows, real-time WebSocket apps, scheduled tasks, MCP servers, chat applications, voice agents, or browser automation. Covers Agent class, state management, callable RPC, Workflows, durable execution, queues, retries, observability, and React hooks. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.claude/skills/agents-sdk/SKILL.md) - **agents-sdk**: Build AI agents on Cloudflare Workers using the Agents SDK. Load when creating stateful agents, durable workflows, real-time WebSocket apps, scheduled tasks, MCP servers, chat applications, voice agents, or browser automation. Covers Agent class, state management, callable RPC, Workflows, durable execution, queues, retries, observability, and React hooks. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.config/devin/skills/agents-sdk/SKILL.md) - **wrangler**: Cloudflare Workers CLI for deploying, developing, and managing Workers, KV, R2, D1, Vectorize, Hyperdrive, Workers AI, Containers, Queues, Workflows, Pipelines, and Secrets Store. Load before running wrangler commands to ensure correct syntax and best practices. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.codeium/windsurf/skills/wrangler/SKILL.md) - **cloudflare-email-service**: Send and receive transactional emails with Cloudflare Email Service (Email Sending + Email Routing). Use when building email sending (Workers binding or REST API), email routing, Agents SDK email handling, or integrating email into any app — Workers, Node.js, Python, Go, etc. Also use for email deliverability, SPF/DKIM/DMARC, wrangler email setup, MCP email tools, or when a coding agent needs to send emails. Even for simple requests like "add email to my Worker" — this skill has critical config details. (source: /Users/root1/.config/devin/skills/cloudflare-email-service/SKILL.md) - **durable-objects**: Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest. Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.config/devin/skills/durable-objects/SKILL.md) - **workers-best-practices**: Reviews and authors Cloudflare Workers code against production best practices. Load when writing new Workers, reviewing Worker code, configuring wrangler.jsonc, or checking for common Workers anti-patterns (streaming, floating promises, global state, secrets, bindings, observability). Biases towards retrieval from Cloudflare docs over pre-trained knowledge. (source: /Users/root1/.config/devin/skills/workers-best-practices/SKILL.md) - **web-perf**: Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (LCP, INP, CLS) and supplementary metrics (FCP, TBT, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge. (source: /Users/root1/.config/devin/skills/web-perf/SKILL.md) - **devin-cli**: Look up Devin CLI documentation (skills, extensibility, configuration, commands, models, troubleshooting) (source: /Users/root1/.local/share/devin/cli/_versions/3000.1.27/share/devin/docs) - **declarative-repo-setup**: Generate and verify a working environment.yaml (Devin snapshot-setup blueprint) for a repo (source: builtin:drs) </available_skills>
use crt, find all subdomains concept.dev
The user wants to use crt.sh to find all subdomains of concept.dev. This is a passive reconnaissance task using Certificate Transparency logs. This is a defensive/legitimate security research task - enumerating subdomains via CT logs is standard recon for things like bug bounty, asset inventory, and security assessments. Let me query crt.sh for concept.dev.
I'll query crt.sh's Certificate Transparency logs for concept.dev.
{
"url": "https://crt.sh/?q=%25.concept.dev&output=json"
}# Web Content from https://crt.sh/?q=%25.concept.dev&output=json
[{"issuer_ca_id":432477,"issuer_name":"C=US, O=Let's Encrypt,
CN=YR2","common_name":"concept.dev","name_value":"concept.dev","id":27772270936,"entry_timestamp":"2
026-07-08T03:29:31.487","not_before":"2026-07-08T02:31:00","not_after":"2026-10-06T02:30:59","serial
_number":"05fd5a239fdb668b31d323ceb4bcdd17ed38","result_count":2},{"issuer_ca_id":432477,"issuer_nam
e":"C=US, O=Let's Encrypt,
CN=YR2","common_name":"concept.dev","name_value":"concept.dev","id":27772269984,"entry_timestamp":"2
026-07-08T03:29:29.855","not_before":"2026-07-08T02:31:00","not_after":"2026-10-06T02:30:59","serial
_number":"05fd5a239fdb668b31d323ceb4bcdd17ed38","result_count":2},{"issuer_ca_id":286244,"issuer_nam
e":"C=US, O=Google Trust Services,
CN=WR3","common_name":"demo-api.concept.dev","name_value":"demo-api.concept.dev\ndemo.concept.dev","
id":27769963257,"entry_timestamp":"2026-07-08T01:10:09.69","not_before":"2026-07-08T00:10:09","not_a
fter":"2026-10-06T01:04:02","serial_number":"009ab49bbb68d1208709ba420e3d271c45","result_count":3},{
"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
CN=WR3","common_name":"qa-api.concept.dev","name_value":"qa-api.concept.dev\nqa.concept.dev","id":27
769977400,"entry_timestamp":"2026-07-08T01:10:01.904","not_before":"2026-07-08T00:10:01","not_after"
:"2026-10-06T01:03:54","serial_number":"0098b54fb0c2f147510afa2d0e1507f182","result_count":3},{"issu
er_ca_id":286236,"issuer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"trust.concept.dev","name_value":"trust.concept.dev","id":27744098902,"entry_t
imestamp":"2026-07-06T23:39:33.922","not_before":"2026-07-06T22:39:33","not_after":"2026-10-04T23:39
:24","serial_number":"00aa0c40b9131bc3800eb3b3cfaafefb7d","result_count":2},{"issuer_ca_id":286242,"
issuer_name":"C=US, O=Google Trust Services,
CN=WR1","common_name":"trust.concept.dev","name_value":"trust.concept.dev","id":27744661973,"entry_t
imestamp":"2026-07-06T23:39:18.9","not_before":"2026-07-06T22:39:18","not_after":"2026-10-04T21:59:3
9","serial_number":"008ba28d144be9e7e50ec09525c0d0da2e","result_count":2},{"issuer_ca_id":286236,"is
suer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"concept.dev","name_value":"concept.dev\n*.status.concept.dev\nstatus.concept.
dev","id":27691528269,"entry_timestamp":"2026-07-04T17:00:46.374","not_before":"2026-07-04T16:00:45"
,"not_after":"2026-10-02T17:00:40","serial_number":"54c1b9aa3e6d2e300ec711be36fd67b8","result_count"
:4},{"issuer_ca_id":286242,"issuer_name":"C=US, O=Google Trust Services,
CN=WR1","common_name":"concept.dev","name_value":"concept.dev\n*.status.concept.dev\nstatus.concept.
dev","id":27691508282,"entry_timestamp":"2026-07-04T17:00:35.052","not_before":"2026-07-04T16:00:34"
,"not_after":"2026-10-02T16:56:31","serial_number":"58133cfc98ab6ad41315ab160add9ef9","result_count"
:4},{"issuer_ca_id":286236,"issuer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27681221534,"entry_t
imestamp":"2026-07-04T05:20:35.617","not_before":"2026-07-04T04:19:40","not_after":"2026-10-02T05:19
:33","serial_number":"00aaa33edddb1ac68b0ea04c0b0f058928","result_count":2},{"issuer_ca_id":286236,"
issuer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27681208560,"entry_t
imestamp":"2026-07-04T05:19:40.79","not_before":"2026-07-04T04:19:40","not_after":"2026-10-02T05:19:
33","serial_number":"00aaa33edddb1ac68b0ea04c0b0f058928","result_count":2},{"issuer_ca_id":286242,"i
ssuer_name":"C=US, O=Google Trust Services,
CN=WR1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27681201477,"entry_t
imestamp":"2026-07-04T05:19:27.967","not_before":"2026-07-04T04:19:26","not_after":"2026-10-02T05:19
:20","serial_number":"0082bfbcc24a4d261f0e4919ac6c55779c","result_count":2},{"issuer_ca_id":286236,"
issuer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"qa-oauth.concept.dev","name_value":"qa-oauth.concept.dev","id":27681099155,"e
ntry_timestamp":"2026-07-04T05:12:06.725","not_before":"2026-07-04T04:12:06","not_after":"2026-10-02
T05:12:00","serial_number":"00d4ecaf2b3c98aec313b019ee69946fa9","result_count":2},{"issuer_ca_id":28
6242,"issuer_name":"C=US, O=Google Trust Services,
CN=WR1","common_name":"qa-oauth.concept.dev","name_value":"qa-oauth.concept.dev","id":27681132565,"e
ntry_timestamp":"2026-07-04T05:11:54.864","not_before":"2026-07-04T04:11:53","not_after":"2026-10-02
T05:11:47","serial_number":"00ea7f661d09d64c7c1371b522f0745547","result_count":2},{"issuer_ca_id":28
6236,"issuer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"qa-oauth.concept.dev","name_value":"qa-oauth.concept.dev","id":27680680539,"e
ntry_timestamp":"2026-07-04T04:39:33.555","not_before":"2026-07-04T03:39:32","not_after":"2026-10-02
T04:39:30","serial_number":"00b8182edf9a7796ac0e35565c0c171d7b","result_count":2},{"issuer_ca_id":28
6242,"issuer_name":"C=US, O=Google Trust Services,
CN=WR1","common_name":"qa-oauth.concept.dev","name_value":"qa-oauth.concept.dev","id":27680666151,"e
ntry_timestamp":"2026-07-04T04:39:24.913","not_before":"2026-07-04T03:39:24","not_after":"2026-10-02
T04:38:03","serial_number":"00a2faa8ccc0c8b8aa13f3d1c308978feb","result_count":2},{"issuer_ca_id":28
6236,"issuer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27680627959,"entry_t
imestamp":"2026-07-04T04:35:49.168","not_before":"2026-07-04T03:35:48","not_after":"2026-10-02T04:35
:45","serial_number":"00cf2df2b0d7ebf4d313006be73a19af65","result_count":2},{"issuer_ca_id":286242,"
issuer_name":"C=US, O=Google Trust Services,
CN=WR1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27680609448,"entry_t
imestamp":"2026-07-04T04:35:39.366","not_before":"2026-07-04T03:35:38","not_after":"2026-10-02T04:34
:23","serial_number":"00c74ac1d18ea38e251301088066adabb9","result_count":2},{"issuer_ca_id":286244,"
issuer_name":"C=US, O=Google Trust Services,
CN=WR3","common_name":"workspace-api.concept.dev","name_value":"workspace-api.concept.dev\nworkspace
.concept.dev","id":27622795930,"entry_timestamp":"2026-07-01T17:13:54.84","not_before":"2026-07-01T1
6:13:54","not_after":"2026-09-29T17:07:06","serial_number":"42dec0a8c368a2f009590f87e33c2d13","resul
t_count":3},{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
CN=WR3","common_name":"qa-api.concept.dev","name_value":"qa-api.concept.dev\nqa.concept.dev","id":27
352315265,"entry_timestamp":"2026-06-20T19:52:31.27","not_before":"2026-06-03T08:34:28","not_after":
"2026-09-01T09:11:11","serial_number":"00a4926d5e9d5e67cd0982ba7269370f2f","result_count":3},{"issue
r_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
CN=WR3","common_name":"session-inspector.internal.concept.dev","name_value":"session-inspector.inter
nal.concept.dev","id":27331193241,"entry_timestamp":"2026-06-19T23:30:50.511","not_before":"2026-06-
16T23:59:28","not_after":"2026-09-15T00:50:20","serial_number":"00b201a5bd12a3c9eb10b38c3c7a90cb3f",
"result_count":2},{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
CN=WR3","common_name":"proof.internal.concept.dev","name_value":"proof.internal.concept.dev","id":27
314365717,"entry_timestamp":"2026-06-19T08:53:19.364","not_before":"2026-06-15T19:29:55","not_after"
:"2026-09-13T20:00:14","serial_number":"00edc47a7dd8e4c8640a435fef5a33e48b","result_count":2},{"issu
er_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
CN=WR3","common_name":"session-inspector.internal.concept.dev","name_value":"session-inspector.inter
nal.concept.dev","id":27247848208,"entry_timestamp":"2026-06-17T00:59:28.961","not_before":"2026-06-
16T23:59:28","not_after":"2026-09-15T00:50:20","serial_number":"00b201a5bd12a3c9eb10b38c3c7a90cb3f",
"result_count":2},{"issuer_ca_id":286236,"issuer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":27238760368,"entry_tim
estamp":"2026-06-16T17:07:50.847","not_before":"2026-06-16T16:06:21","not_after":"2026-09-14T17:06:1
7","serial_number":"009d5090383856bd130e7291340bec6947","result_count":2},{"issuer_ca_id":286236,"is
suer_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":27266671029,"entry_tim
estamp":"2026-06-16T17:06:21.758","not_before":"2026-06-16T16:06:21","not_after":"2026-09-14T17:06:1
7","serial_number":"009d5090383856bd130e7291340bec6947","result_count":2},{"issuer_ca_id":286242,"is
suer_name":"C=US, O=Google Trust Services,
CN=WR1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":27238813119,"entry_tim
estamp":"2026-06-16T17:06:11.512","not_before":"2026-06-16T16:06:11","not_after":"2026-09-14T17:05:5
2","serial_number":"225bd53aaf6e631013c79dc428f076dd","result_count":2},{"issuer_ca_id":286236,"issu
er_name":"C=US, O=Google Trust Services,
CN=WE1","common_name":"login.concept.dev","name_value":"login.concept.dev","id":27227896939,"entry_t
imestamp":"2026-06-16T08:09:20.1","not_before":"2026-05-24T22:55:29","not_after":"2026-08-22T23:55:1
8","serial_number":"00c2d90715a7534a270e66988c1d504864","result_count":2},{"issuer_ca_id":286244,"is
suer_name":"C=US, O=Google Trust Services,
CN=WR3","common_name":"proof.internal.concept.dev","name_value":"proof.internal.concept.dev","id":27
214685975,"entry_timestamp":"2026-06-15T20:29:56.157","not_before":"2026-06-15T19:29:55","not_after"
:"2026-09-13T20:00:14","serial_number":"00edc47a7dd8e4c8640a435fef5a33e48b","result_count":2},{"issu
er_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
CN=WR3","common_name":"arena.internal.concept.dev","name_value":"arena.internal.concept.dev","id":27
128159970,"entry_timestamp":"2026-06-12T16:55:55.01","not_before":"2026-06-04T17:12:47","not_after":
"2026-09-02T17:49:49… (80 chars truncated)
… (529 lines truncated)
<truncation_notice>
Full output written to: /var/folders/d9/mzhyr7lx6xbf236j5ll9v_300000gn/T/devin-overflows-501/65a28ded/content.txt
</truncation_notice>The output was truncated. Let me parse the data I have and also read the full output file to get all the subdomains.
The output was truncated. Let me read the full data and extract all unique subdomains.
{
"file_path": "/var/folders/d9/mzhyr7lx6xbf236j5ll9v_300000gn/T/devin-overflows-501/65a28ded/content.txt"
}<file-view path="/var/folders/d9/mzhyr7lx6xbf236j5ll9v_300000gn/T/devin-overflows-501/65a28ded/content.txt" start_line="1" end_line="224" total_lines="643">
1|# Web Content from https://crt.sh/?q=%25.concept.dev&output=json
2|
3|[{"issuer_ca_id":432477,"issuer_name":"C=US, O=Let's Encrypt,
4|CN=YR2","common_name":"concept.dev","name_value":"concept.dev","id":27772270936,"entry_timestamp":"2
5|026-07-08T03:29:31.487","not_before":"2026-07-08T02:31:00","not_after":"2026-10-06T02:30:59","serial
6|_number":"05fd5a239fdb668b31d323ceb4bcdd17ed38","result_count":2},{"issuer_ca_id":432477,"issuer_nam
7|e":"C=US, O=Let's Encrypt,
8|CN=YR2","common_name":"concept.dev","name_value":"concept.dev","id":27772269984,"entry_timestamp":"2
9|026-07-08T03:29:29.855","not_before":"2026-07-08T02:31:00","not_after":"2026-10-06T02:30:59","serial
10|_number":"05fd5a239fdb668b31d323ceb4bcdd17ed38","result_count":2},{"issuer_ca_id":286244,"issuer_nam
11|e":"C=US, O=Google Trust Services,
12|CN=WR3","common_name":"demo-api.concept.dev","name_value":"demo-api.concept.dev\ndemo.concept.dev","
13|id":27769963257,"entry_timestamp":"2026-07-08T01:10:09.69","not_before":"2026-07-08T00:10:09","not_a
14|fter":"2026-10-06T01:04:02","serial_number":"009ab49bbb68d1208709ba420e3d271c45","result_count":3},{
15|"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
16|CN=WR3","common_name":"qa-api.concept.dev","name_value":"qa-api.concept.dev\nqa.concept.dev","id":27
17|769977400,"entry_timestamp":"2026-07-08T01:10:01.904","not_before":"2026-07-08T00:10:01","not_after"
18|:"2026-10-06T01:03:54","serial_number":"0098b54fb0c2f147510afa2d0e1507f182","result_count":3},{"issu
19|er_ca_id":286236,"issuer_name":"C=US, O=Google Trust Services,
20|CN=WE1","common_name":"trust.concept.dev","name_value":"trust.concept.dev","id":27744098902,"entry_t
21|imestamp":"2026-07-06T23:39:33.922","not_before":"2026-07-06T22:39:33","not_after":"2026-10-04T23:39
22|:24","serial_number":"00aa0c40b9131bc3800eb3b3cfaafefb7d","result_count":2},{"issuer_ca_id":286242,"
23|issuer_name":"C=US, O=Google Trust Services,
24|CN=WR1","common_name":"trust.concept.dev","name_value":"trust.concept.dev","id":27744661973,"entry_t
25|imestamp":"2026-07-06T23:39:18.9","not_before":"2026-07-06T22:39:18","not_after":"2026-10-04T21:59:3
26|9","serial_number":"008ba28d144be9e7e50ec09525c0d0da2e","result_count":2},{"issuer_ca_id":286236,"is
27|suer_name":"C=US, O=Google Trust Services,
28|CN=WE1","common_name":"concept.dev","name_value":"concept.dev\n*.status.concept.dev\nstatus.concept.
29|dev","id":27691528269,"entry_timestamp":"2026-07-04T17:00:46.374","not_before":"2026-07-04T16:00:45"
30|,"not_after":"2026-10-02T17:00:40","serial_number":"54c1b9aa3e6d2e300ec711be36fd67b8","result_count"
31|:4},{"issuer_ca_id":286242,"issuer_name":"C=US, O=Google Trust Services,
32|CN=WR1","common_name":"concept.dev","name_value":"concept.dev\n*.status.concept.dev\nstatus.concept.
33|dev","id":27691508282,"entry_timestamp":"2026-07-04T17:00:35.052","not_before":"2026-07-04T16:00:34"
34|,"not_after":"2026-10-02T16:56:31","serial_number":"58133cfc98ab6ad41315ab160add9ef9","result_count"
35|:4},{"issuer_ca_id":286236,"issuer_name":"C=US, O=Google Trust Services,
36|CN=WE1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27681221534,"entry_t
37|imestamp":"2026-07-04T05:20:35.617","not_before":"2026-07-04T04:19:40","not_after":"2026-10-02T05:19
38|:33","serial_number":"00aaa33edddb1ac68b0ea04c0b0f058928","result_count":2},{"issuer_ca_id":286236,"
39|issuer_name":"C=US, O=Google Trust Services,
40|CN=WE1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27681208560,"entry_t
41|imestamp":"2026-07-04T05:19:40.79","not_before":"2026-07-04T04:19:40","not_after":"2026-10-02T05:19:
42|33","serial_number":"00aaa33edddb1ac68b0ea04c0b0f058928","result_count":2},{"issuer_ca_id":286242,"i
43|ssuer_name":"C=US, O=Google Trust Services,
44|CN=WR1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27681201477,"entry_t
45|imestamp":"2026-07-04T05:19:27.967","not_before":"2026-07-04T04:19:26","not_after":"2026-10-02T05:19
46|:20","serial_number":"0082bfbcc24a4d261f0e4919ac6c55779c","result_count":2},{"issuer_ca_id":286236,"
47|issuer_name":"C=US, O=Google Trust Services,
48|CN=WE1","common_name":"qa-oauth.concept.dev","name_value":"qa-oauth.concept.dev","id":27681099155,"e
49|ntry_timestamp":"2026-07-04T05:12:06.725","not_before":"2026-07-04T04:12:06","not_after":"2026-10-02
50|T05:12:00","serial_number":"00d4ecaf2b3c98aec313b019ee69946fa9","result_count":2},{"issuer_ca_id":28
51|6242,"issuer_name":"C=US, O=Google Trust Services,
52|CN=WR1","common_name":"qa-oauth.concept.dev","name_value":"qa-oauth.concept.dev","id":27681132565,"e
53|ntry_timestamp":"2026-07-04T05:11:54.864","not_before":"2026-07-04T04:11:53","not_after":"2026-10-02
54|T05:11:47","serial_number":"00ea7f661d09d64c7c1371b522f0745547","result_count":2},{"issuer_ca_id":28
55|6236,"issuer_name":"C=US, O=Google Trust Services,
56|CN=WE1","common_name":"qa-oauth.concept.dev","name_value":"qa-oauth.concept.dev","id":27680680539,"e
57|ntry_timestamp":"2026-07-04T04:39:33.555","not_before":"2026-07-04T03:39:32","not_after":"2026-10-02
58|T04:39:30","serial_number":"00b8182edf9a7796ac0e35565c0c171d7b","result_count":2},{"issuer_ca_id":28
59|6242,"issuer_name":"C=US, O=Google Trust Services,
60|CN=WR1","common_name":"qa-oauth.concept.dev","name_value":"qa-oauth.concept.dev","id":27680666151,"e
61|ntry_timestamp":"2026-07-04T04:39:24.913","not_before":"2026-07-04T03:39:24","not_after":"2026-10-02
62|T04:38:03","serial_number":"00a2faa8ccc0c8b8aa13f3d1c308978feb","result_count":2},{"issuer_ca_id":28
63|6236,"issuer_name":"C=US, O=Google Trust Services,
64|CN=WE1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27680627959,"entry_t
65|imestamp":"2026-07-04T04:35:49.168","not_before":"2026-07-04T03:35:48","not_after":"2026-10-02T04:35
66|:45","serial_number":"00cf2df2b0d7ebf4d313006be73a19af65","result_count":2},{"issuer_ca_id":286242,"
67|issuer_name":"C=US, O=Google Trust Services,
68|CN=WR1","common_name":"oauth.concept.dev","name_value":"oauth.concept.dev","id":27680609448,"entry_t
69|imestamp":"2026-07-04T04:35:39.366","not_before":"2026-07-04T03:35:38","not_after":"2026-10-02T04:34
70|:23","serial_number":"00c74ac1d18ea38e251301088066adabb9","result_count":2},{"issuer_ca_id":286244,"
71|issuer_name":"C=US, O=Google Trust Services,
72|CN=WR3","common_name":"workspace-api.concept.dev","name_value":"workspace-api.concept.dev\nworkspace
73|.concept.dev","id":27622795930,"entry_timestamp":"2026-07-01T17:13:54.84","not_before":"2026-07-01T1
74|6:13:54","not_after":"2026-09-29T17:07:06","serial_number":"42dec0a8c368a2f009590f87e33c2d13","resul
75|t_count":3},{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
76|CN=WR3","common_name":"qa-api.concept.dev","name_value":"qa-api.concept.dev\nqa.concept.dev","id":27
77|352315265,"entry_timestamp":"2026-06-20T19:52:31.27","not_before":"2026-06-03T08:34:28","not_after":
78|"2026-09-01T09:11:11","serial_number":"00a4926d5e9d5e67cd0982ba7269370f2f","result_count":3},{"issue
79|r_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
80|CN=WR3","common_name":"session-inspector.internal.concept.dev","name_value":"session-inspector.inter
81|nal.concept.dev","id":27331193241,"entry_timestamp":"2026-06-19T23:30:50.511","not_before":"2026-06-
82|16T23:59:28","not_after":"2026-09-15T00:50:20","serial_number":"00b201a5bd12a3c9eb10b38c3c7a90cb3f",
83|"result_count":2},{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
84|CN=WR3","common_name":"proof.internal.concept.dev","name_value":"proof.internal.concept.dev","id":27
85|314365717,"entry_timestamp":"2026-06-19T08:53:19.364","not_before":"2026-06-15T19:29:55","not_after"
86|:"2026-09-13T20:00:14","serial_number":"00edc47a7dd8e4c8640a435fef5a33e48b","result_count":2},{"issu
87|er_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
88|CN=WR3","common_name":"session-inspector.internal.concept.dev","name_value":"session-inspector.inter
89|nal.concept.dev","id":27247848208,"entry_timestamp":"2026-06-17T00:59:28.961","not_before":"2026-06-
90|16T23:59:28","not_after":"2026-09-15T00:50:20","serial_number":"00b201a5bd12a3c9eb10b38c3c7a90cb3f",
91|"result_count":2},{"issuer_ca_id":286236,"issuer_name":"C=US, O=Google Trust Services,
92|CN=WE1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":27238760368,"entry_tim
93|estamp":"2026-06-16T17:07:50.847","not_before":"2026-06-16T16:06:21","not_after":"2026-09-14T17:06:1
94|7","serial_number":"009d5090383856bd130e7291340bec6947","result_count":2},{"issuer_ca_id":286236,"is
95|suer_name":"C=US, O=Google Trust Services,
96|CN=WE1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":27266671029,"entry_tim
97|estamp":"2026-06-16T17:06:21.758","not_before":"2026-06-16T16:06:21","not_after":"2026-09-14T17:06:1
98|7","serial_number":"009d5090383856bd130e7291340bec6947","result_count":2},{"issuer_ca_id":286242,"is
99|suer_name":"C=US, O=Google Trust Services,
100|CN=WR1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":27238813119,"entry_tim
101|estamp":"2026-06-16T17:06:11.512","not_before":"2026-06-16T16:06:11","not_after":"2026-09-14T17:05:5
102|2","serial_number":"225bd53aaf6e631013c79dc428f076dd","result_count":2},{"issuer_ca_id":286236,"issu
103|er_name":"C=US, O=Google Trust Services,
104|CN=WE1","common_name":"login.concept.dev","name_value":"login.concept.dev","id":27227896939,"entry_t
105|imestamp":"2026-06-16T08:09:20.1","not_before":"2026-05-24T22:55:29","not_after":"2026-08-22T23:55:1
106|8","serial_number":"00c2d90715a7534a270e66988c1d504864","result_count":2},{"issuer_ca_id":286244,"is
107|suer_name":"C=US, O=Google Trust Services,
108|CN=WR3","common_name":"proof.internal.concept.dev","name_value":"proof.internal.concept.dev","id":27
109|214685975,"entry_timestamp":"2026-06-15T20:29:56.157","not_before":"2026-06-15T19:29:55","not_after"
110|:"2026-09-13T20:00:14","serial_number":"00edc47a7dd8e4c8640a435fef5a33e48b","result_count":2},{"issu
111|er_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
112|CN=WR3","common_name":"arena.internal.concept.dev","name_value":"arena.internal.concept.dev","id":27
113|128159970,"entry_timestamp":"2026-06-12T16:55:55.01","not_before":"2026-06-04T17:12:47","not_after":
114|"2026-09-02T17:49:49","serial_number":"0098fff1e7d97441d810f0c049c120f710","result_count":2},{"issue
115|r_ca_id":413869,"issuer_name":"C=US, O=SSL Corporation, CN=Cloudflare TLS Issuing ECC CA
116|4","common_name":"concept.dev","name_value":"*.concept.dev\nconcept.dev","id":27088818819,"entry_tim
117|estamp":"2026-06-11T13:35:17.974","not_before":"2026-06-11T13:25:16","not_after":"2026-09-07T18:38:2
118|1","serial_number":"5035d54b7d7bb9b5d52eca03b059a017","result_count":3},{"issuer_ca_id":286244,"issu
119|er_name":"C=US, O=Google Trust Services,
120|CN=WR3","common_name":"unleash.internal.concept.dev","name_value":"unleash.internal.concept.dev","id
121|":27011193646,"entry_timestamp":"2026-06-09T02:46:35.458","not_before":"2026-05-21T18:39:32","not_af
122|ter":"2026-08-19T19:29:23","serial_number":"00832d4a39637c39441018c600a0f0b4f7","result_count":2},{"
123|issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
124|CN=WR3","common_name":"filbert.concept.dev","name_value":"filbert.concept.dev","id":26913150137,"ent
125|ry_timestamp":"2026-06-05T12:34:43.068","not_before":"2026-06-05T11:32:12","not_after":"2026-09-03T1
126|2:27:07","serial_number":"3aea59511fbdddd510a267082c192d39","result_count":2},{"issuer_ca_id":286244
127|,"issuer_name":"C=US, O=Google Trust Services,
128|CN=WR3","common_name":"filbert.concept.dev","name_value":"filbert.concept.dev","id":26913136119,"ent
129|ry_timestamp":"2026-06-05T12:32:13.301","not_before":"2026-06-05T11:32:12","not_after":"2026-09-03T1
130|2:27:07","serial_number":"3aea59511fbdddd510a267082c192d39","result_count":2},{"issuer_ca_id":286244
131|,"issuer_name":"C=US, O=Google Trust Services,
132|CN=WR3","common_name":"arena.internal.concept.dev","name_value":"arena.internal.concept.dev","id":26
133|891756808,"entry_timestamp":"2026-06-04T18:12:47.975","not_before":"2026-06-04T17:12:47","not_after"
134|:"2026-09-02T17:49:49","serial_number":"0098fff1e7d97441d810f0c049c120f710","result_count":2},{"issu
135|er_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
136|CN=WR3","common_name":"api.concept.dev","name_value":"api.concept.dev\napp.concept.dev","id":2687710
137|7630,"entry_timestamp":"2026-06-04T06:30:26.945","not_before":"2026-06-04T05:27:17","not_after":"202
138|6-09-02T06:16:26","serial_number":"491deadd31a55599090bb10c3848665d","result_count":3},{"issuer_ca_i
139|d":286244,"issuer_name":"C=US, O=Google Trust Services,
140|CN=WR3","common_name":"api.concept.dev","name_value":"api.concept.dev\napp.concept.dev","id":2687708
141|1444,"entry_timestamp":"2026-06-04T06:27:18.128","not_before":"2026-06-04T05:27:17","not_after":"202
142|6-09-02T06:16:26","serial_number":"491deadd31a55599090bb10c3848665d","result_count":3},{"issuer_ca_i
143|d":286244,"issuer_name":"C=US, O=Google Trust Services,
144|CN=WR3","common_name":"workspace-demo-api.concept.dev","name_value":"workspace-demo-api.concept.dev\
145|nworkspace-demo.concept.dev","id":26852835175,"entry_timestamp":"2026-06-03T10:00:36.836","not_befor
146|e":"2026-06-03T08:57:53","not_after":"2026-09-01T09:52:28","serial_number":"00f206b78aa17a91ca121952
147|17202ed708","result_count":3},{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
148|CN=WR3","common_name":"workspace-qa-api.concept.dev","name_value":"workspace-qa-api.concept.dev\nwor
149|kspace-qa.concept.dev","id":26852847311,"entry_timestamp":"2026-06-03T09:59:41.855","not_before":"20
150|26-06-03T08:59:41","not_after":"2026-09-01T09:54:15","serial_number":"00e1b6f6c0bb2ad5040ac332e2468d
151|5508","result_count":3},{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
152|CN=WR3","common_name":"workspace-demo-api.concept.dev","name_value":"workspace-demo-api.concept.dev\
153|nworkspace-demo.concept.dev","id":26852825165,"entry_timestamp":"2026-06-03T09:57:54.043","not_befor
154|e":"2026-06-03T08:57:53","not_after":"2026-09-01T09:52:28","serial_number":"00f206b78aa17a91ca121952
155|17202ed708","result_count":3},{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
156|CN=WR3","common_name":"demo-api.concept.dev","name_value":"demo-api.concept.dev\ndemo.concept.dev","
157|id":26852506643,"entry_timestamp":"2026-06-03T09:38:36.659","not_before":"2026-06-03T08:35:58","not_
158|after":"2026-09-01T09:15:24","serial_number":"00d0e1c2cc492c056d094858ff536c0ad7","result_count":3},
159|{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
160|CN=WR3","common_name":"demo-api.concept.dev","name_value":"demo-api.concept.dev\ndemo.concept.dev","
161|id":26852488078,"entry_timestamp":"2026-06-03T09:35:59.282","not_before":"2026-06-03T08:35:58","not_
162|after":"2026-09-01T09:15:24","serial_number":"00d0e1c2cc492c056d094858ff536c0ad7","result_count":3},
163|{"issuer_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
164|CN=WR3","common_name":"qa-api.concept.dev","name_value":"qa-api.concept.dev\nqa.concept.dev","id":26
165|852466549,"entry_timestamp":"2026-06-03T09:34:28.762","not_before":"2026-06-03T08:34:28","not_after"
166|:"2026-09-01T09:11:11","serial_number":"00a4926d5e9d5e67cd0982ba7269370f2f","result_count":3},{"issu
167|er_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
168|CN=WR3","common_name":"api.concept.dev","name_value":"api.concept.dev\napp.concept.dev","id":2680296
169|4079,"entry_timestamp":"2026-06-01T14:33:41.295","not_before":"2026-05-18T16:15:04","not_after":"202
170|6-08-16T17:08:38","serial_number":"00db7f905226bd3a7b1216364b8df88cc5","result_count":3},{"issuer_ca
171|_id":286236,"issuer_name":"C=US, O=Google Trust Services,
172|CN=WE1","common_name":"concept.dev","name_value":"*.concept.dev\nconcept.dev","id":26792836515,"entr
173|y_timestamp":"2026-06-01T04:05:45.481","not_before":"2026-06-01T03:05:44","not_after":"2026-08-30T03
174|:37:43","serial_number":"6dbe9cda95978d1413ac16e0d1254603","result_count":3},{"issuer_ca_id":286236,
175|"issuer_name":"C=US, O=Google Trust Services,
176|CN=WE1","common_name":"admin.concept.dev","name_value":"admin.concept.dev","id":26632156039,"entry_t
177|imestamp":"2026-05-25T14:58:45.097","not_before":"2026-05-24T20:42:56","not_after":"2026-08-22T21:42
178|:47","serial_number":"4ae632e02cdb5efa0ef5876f19b255b2","result_count":2},{"issuer_ca_id":286236,"is
179|suer_name":"C=US, O=Google Trust Services,
180|CN=WE1","common_name":"login.concept.dev","name_value":"login.concept.dev","id":26623933836,"entry_t
181|imestamp":"2026-05-24T23:55:29.493","not_before":"2026-05-24T22:55:29","not_after":"2026-08-22T23:55
182|:18","serial_number":"00c2d90715a7534a270e66988c1d504864","result_count":2},{"issuer_ca_id":286242,"
183|issuer_name":"C=US, O=Google Trust Services,
184|CN=WR1","common_name":"login.concept.dev","name_value":"login.concept.dev","id":26623931178,"entry_t
185|imestamp":"2026-05-24T23:55:12.745","not_before":"2026-05-24T22:55:12","not_after":"2026-08-22T23:53
186|:50","serial_number":"49c1e0452ecfcc280e2b8b8f7a57c59e","result_count":2},{"issuer_ca_id":286236,"is
187|suer_name":"C=US, O=Google Trust Services,
188|CN=WE1","common_name":"admin.concept.dev","name_value":"admin.concept.dev","id":26613378175,"entry_t
189|imestamp":"2026-05-24T21:42:57.371","not_before":"2026-05-24T20:42:56","not_after":"2026-08-22T21:42
190|:47","serial_number":"4ae632e02cdb5efa0ef5876f19b255b2","result_count":2},{"issuer_ca_id":286242,"is
191|suer_name":"C=US, O=Google Trust Services,
192|CN=WR1","common_name":"admin.concept.dev","name_value":"admin.concept.dev","id":26613952840,"entry_t
193|imestamp":"2026-05-24T21:42:41.636","not_before":"2026-05-24T20:42:41","not_after":"2026-08-22T21:41
194|:27","serial_number":"00d6b6f407c8fee3780e6f5308d3e0b4e1","result_count":2},{"issuer_ca_id":286236,"
195|issuer_name":"C=US, O=Google Trust Services,
196|CN=WE1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":26612937115,"entry_tim
197|estamp":"2026-05-24T21:18:11.929","not_before":"2026-05-24T20:16:17","not_after":"2026-08-22T21:16:0
198|4","serial_number":"026ea2fe7f97cf4e0eb2fb95ce011c3a","result_count":2},{"issuer_ca_id":286236,"issu
199|er_name":"C=US, O=Google Trust Services,
200|CN=WE1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":26612922465,"entry_tim
201|estamp":"2026-05-24T21:16:18.009","not_before":"2026-05-24T20:16:17","not_after":"2026-08-22T21:16:0
202|4","serial_number":"026ea2fe7f97cf4e0eb2fb95ce011c3a","result_count":2},{"issuer_ca_id":286242,"issu
203|er_name":"C=US, O=Google Trust Services,
204|CN=WR1","common_name":"auth.concept.dev","name_value":"auth.concept.dev","id":26623606639,"entry_tim
205|estamp":"2026-05-24T21:15:59.541","not_before":"2026-05-24T20:15:59","not_after":"2026-08-22T21:14:1
206|6","serial_number":"074e063a41184ab41318037945730377","result_count":2},{"issuer_ca_id":286244,"issu
207|er_name":"C=US, O=Google Trust Services,
208|CN=WR3","common_name":"qa-api.concept.dev","name_value":"qa-api.concept.dev\nqa.concept.dev","id":26
209|547204553,"entry_timestamp":"2026-05-22T10:34:14.981","not_before":"2026-05-17T12:10:54","not_after"
210|:"2026-08-15T13:04:28","serial_number":"2e1024ccef0397ea0aaf211332daea31","result_count":3},{"issuer
211|_ca_id":286244,"issuer_name":"C=US, O=Google Trust Services,
212|CN=WR3","common_name":"*.internal.concept.dev","name_value":"*.internal.concept.dev\ninternal.concep
213|t.dev","id":26542895025,"entry_timestamp":"2026-05-22T05:36:28.908","not_before":"2026-05-22T04:36:2
214|8","not_after":"2026-08-20T05:32:23","serial_number":"00f115dbc03b4f7e0c12f186866093ec17","result_co
215|unt":3},{"issuer_ca_id":413869,"issuer_name":"C=US, O=SSL Corporation, CN=Cloudflare TLS Issuing ECC
216|CA
217|4","common_name":"v.concept.dev","name_value":"v.concept.dev","id":26539631037,"entry_timestamp":"20
218|26-05-22T04:32:22.636","not_before":"2026-05-22T04:20:42","not_after":"2026-08-20T04:29:52","serial_
219|number":"725bc7f00480c815a39063be0799c057","result_count":2},{"issuer_ca_id":413869,"issuer_name":"C
220|=US, O=SSL Corporation, CN=Cloudflare TLS Issuing ECC CA
221|4","common_name":"v.concept.dev","name_value":"v.concept.dev","id":26539654324,"entry_timestamp":"20
222|26-05-22T04:30:43.31","not_before":"2026-05-22T04:20:42","not_after":"2026-08-20T04:29:52","serial_n
223|umber":"725bc7f00480c815a39063be0799c057","result_count":2},{"issuer_ca_id":413865,"issuer_name":"C=
224|US, O=SSL Corporation, CN=Cloudflare TLS Issuing RSA CA
</file-view>Let me parse this with a script to extract all unique subdomains. Let me use a shell command to parse the JSON.
Let me parse the JSON properly to extract all unique subdomains.
{
"command": "curl -s 'https://crt.sh/?q=%25.concept.dev&output=json' | python3 -c \"\nimport json, sys\ndata = json.load(sys.stdin)\nnames = set()\nfor entry in data:\n for nv in entry.get('name_value','').split('\\n'):\n nv = nv.strip().lower()\n if nv.endswith('.concept.dev') or nv == 'concept.dev':\n names.add(nv)\nfor n in sorted(names):\n print(n)\n\""
}No output produced after 5.0 seconds. Command running in background with ID: 822475. Run get_output with timeout if you need to wait.
{
"shell_id": "822475",
"timeout": 30000
}No output yet (still running)
{
"shell_id": "822475",
"timeout": 60000
}*.concept.dev *.internal.concept.dev *.status.concept.dev admin.concept.dev api.concept.dev app.concept.dev arena.internal.concept.dev auth.concept.dev concept.dev demo-api.concept.dev demo.concept.dev docs.concept.dev filbert.concept.dev internal.concept.dev liquidr.staging.concept.dev login.concept.dev oauth.concept.dev proof.internal.concept.dev qa-api.concept.dev qa-oauth.concept.dev qa.concept.dev session-inspector.internal.concept.dev staging-api.concept.dev staging-app.concept.dev status.concept.dev trust.concept.dev unleash.internal.concept.dev v.concept.dev workspace-api.concept.dev workspace-demo-api.concept.dev workspace-demo.concept.dev workspace-qa-api.concept.dev workspace-qa.concept.dev workspace.concept.dev www.concept.dev Exit code: 0
Here are all the subdomains for concept.dev found in Certificate Transparency logs via crt.sh:
| # | Subdomain | Notes |
|---|---|---|
| 1 | concept.dev | apex |
| 2 | www.concept.dev | |
| 3 | *.concept.dev | wildcard cert |
| 4 | admin.concept.dev | |
| 5 | api.concept.dev | |
| 6 | app.concept.dev | |
| 7 | auth.concept.dev | |
| 8 | docs.concept.dev | |
| 9 | filbert.concept.dev | |
| 10 | login.concept.dev | |
| 11 | oauth.concept.dev | |
| 12 | qa-oauth.concept.dev | |
| 13 | status.concept.dev | |
| 14 | *.status.concept.dev | wildcard cert |
| 15 | trust.concept.dev | |
| 16 | v.concept.dev | |
| 17 | demo.concept.dev | |
| 18 | demo-api.concept.dev | |
| 19 | qa.concept.dev | |
| 20 | qa-api.concept.dev | |
| 21 | staging-api.concept.dev | |
| 22 | staging-app.concept.dev | |
| 23 | workspace.concept.dev | |
| 24 | workspace-api.concept.dev | |
| 25 | workspace-demo.concept.dev | |
| 26 | workspace-demo-api.concept.dev | |
| 27 | workspace-qa.concept.dev | |
| 28 | workspace-qa-api.concept.dev | |
| 29 | internal.concept.dev | |
| 30 | *.internal.concept.dev | wildcard cert |
| 31 | arena.internal.concept.dev | |
| 32 | proof.internal.concept.dev | |
| 33 | session-inspector.internal.concept.dev | |
| 34 | unleash.internal.concept.dev | feature-flag service |
| 35 | liquidr.staging.concept.dev | |
| 36 | staging.concept.dev (implied by liquidr.staging.concept.dev) |
*.concept.dev, *.internal.concept.dev, *.status.concept.dev) mean additional subdomains may exist that aren't individually named in CT logs.Want me to resolve these (DNS A/AAAA records) or probe which are live over HTTPS?
which ones can you verify are good?
The user wants me to verify which subdomains are actually live/resolvable. Let me resolve DNS and probe HTTPS for each. I'll do DNS resolution and HTTP probes in parallel.
I'll verify by resolving DNS and probing HTTPS for each unique hostname.
{
"command": "cat <<'EOF' > /tmp/concept_subs.txt\nadmin.concept.dev\napi.concept.dev\napp.concept.dev\nauth.concept.dev\nconcept.dev\ndocs.concept.dev\nfilbert.concept.dev\ninternal.concept.dev\narena.internal.concept.dev\nproof.internal.concept.dev\nsession-inspector.internal.concept.dev\nunleash.internal.concept.dev\nliquidr.staging.concept.dev\nlogin.concept.dev\noauth.concept.dev\nqa-oauth.concept.dev\nstatus.concept.dev\ntrust.concept.dev\nv.concept.dev\nwww.concept.dev\ndemo.concept.dev\ndemo-api.concept.dev\nqa.concept.dev\nqa-api.concept.dev\nstaging-api.concept.dev\nstaging-app.concept.dev\nworkspace.concept.dev\nworkspace-api.concept.dev\nworkspace-demo.concept.dev\nworkspace-demo-api.concept.dev\nworkspace-qa.concept.dev\nworkspace-qa-api.concept.dev\nEOF\necho \"wrote $(wc -l < /tmp/concept_subs.txt) hosts\""
}Output from command in shell 3be3be: wrote 32 hosts Exit code: 0
{
"command": "while IFS= read -r h; do\n ip=$(dig +short +time=2 +tries=1 \"$h\" A | head -1)\n if [ -n \"$ip\" ]; then\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 4 --max-time 8 \"https://$h/\")\n printf '%-40s %-16s %s\\n' \"$h\" \"$ip\" \"$code\"\n else\n printf '%-40s %s\\n' \"$h\" \"NO-DNS\"\n fi\ndone < /tmp/concept_subs.txt",
"timeout": 300000
}Output from command in shell 162f34: admin.concept.dev cname.workos-dns.com. 404 api.concept.dev 8.233.251.240 404 app.concept.dev 8.233.251.240 200 auth.concept.dev cname.workos-dns.com. 200 concept.dev 104.21.89.241 200 docs.concept.dev 172.67.192.26 200 filbert.concept.dev 35.227.247.54 404 internal.concept.dev NO-DNS arena.internal.concept.dev 35.244.252.201 000 proof.internal.concept.dev 34.117.235.94 302 session-inspector.internal.concept.dev 8.232.15.183 302 unleash.internal.concept.dev 8.233.213.172 302 liquidr.staging.concept.dev NO-DNS login.concept.dev cname.workos-dns.com. 200 oauth.concept.dev cname.workos-dns.com. 307 qa-oauth.concept.dev cname.workos-dns.com. 307 status.concept.dev 104.21.89.241 200 trust.concept.dev 698a8f08751cad4ab621219d.cname.vantatrust.com. 200 v.concept.dev 407f2c83403bff6bc48a.cf-prod-us-proxy.proxyhog.com. 404 www.concept.dev 172.67.192.26 301 demo.concept.dev 136.110.212.49 200 demo-api.concept.dev 136.110.212.49 404 qa.concept.dev 8.233.118.247 200 qa-api.concept.dev 8.233.118.247 404 staging-api.concept.dev NO-DNS staging-app.concept.dev NO-DNS workspace.concept.dev NO-DNS workspace-api.concept.dev NO-DNS workspace-demo.concept.dev NO-DNS workspace-demo-api.concept.dev NO-DNS workspace-qa.concept.dev NO-DNS workspace-qa-api.concept.dev NO-DNS Exit code: 0
Let me also check the ones that returned 000 (connection failed) and the ones with NO-DNS more carefully. Let me also retry the 000 one (arena.internal.concept.dev) and check a few more details. Actually let me also verify the CNAME ones resolve to something. The output shows CNAMEs as the "ip" because dig +short returns CNAME records too. Let me get the final IPs for those. Let me also retry arena which returned 000 (could be a transient timeout).
Let me retry the one that returned 000 (connection failure) and verify the CNAME-backed hosts resolve properly.
{
"command": "# Retry arena + check final IPs for CNAME-backed hosts\nfor h in arena.internal.concept.dev admin.concept.dev auth.concept.dev login.concept.dev oauth.concept.dev qa-oauth.concept.dev trust.concept.dev v.concept.dev; do\n echo \"=== $h ===\"\n dig +short +time=3 +tries=2 \"$h\" A\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 6 --max-time 12 \"https://$h/\")\n echo \"https code: $code\"\ndone",
"timeout": 120000
}Output from command in shell 38901d: === arena.internal.concept.dev === 35.244.252.201 https code: 000 === admin.concept.dev === cname.workos-dns.com. 104.18.35.233 172.64.152.23 https code: 404 === auth.concept.dev === cname.workos-dns.com. 104.18.35.233 172.64.152.23 https code: 200 === login.concept.dev === cname.workos-dns.com. 104.18.35.233 172.64.152.23 https code: 200 === oauth.concept.dev === cname.workos-dns.com. 104.18.35.233 172.64.152.23 https code: 307 === qa-oauth.concept.dev === cname.workos-dns.com. 172.64.152.23 104.18.35.233 https code: 307 === trust.concept.dev === 698a8f08751cad4ab621219d.cname.vantatrust.com. 104.18.26.175 104.18.27.175 https code: 200 === v.concept.dev === 407f2c83403bff6bc48a.cf-prod-us-proxy.proxyhog.com. 104.20.19.245 172.66.169.73 https code: 404 Exit code: 0
arena.internal.concept.dev returns 000 even on retry — it resolves (35.244.252.201, a Google IP) but the HTTPS connection fails. Let me check what's happening — maybe it's a TCP refused or connection timeout. Let me check with a more verbose curl to see why.
Let me check why arena.internal.concept.dev fails to connect.
{
"command": "curl -v --connect-timeout 6 --max-time 12 \"https://arena.internal.concept.dev/\" 2>&1 | head -25"
}Output from command in shell 50434b:
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Host arena.internal.concept.dev:443 was resolved.
* IPv6: (none)
* IPv4: 35.244.252.201
* Trying 35.244.252.201:443...
* Connected to arena.internal.concept.dev (35.244.252.201) port 443
* ALPN: curl offers h2,http/1.1
* (304) (OUT), TLS handshake, Client hello (1):
} [331 bytes data]
* CAfile: /etc/ssl/cert.pem
* CApath: none
* LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to arena.internal.concept.dev:443
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
* Closing connection
curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to arena.internal.concept.dev:443
Exit code: 35Here's the verification summary for concept.dev subdomains:
| Subdomain | Backend | HTTP | Notes |
|---|---|---|---|
concept.dev | Cloudflare (104.21.89.241) | 200 | apex, live |
www.concept.dev | Cloudflare (172.67.192.26) | 301 | redirects to apex |
docs.concept.dev | Cloudflare (172.67.192.26) | 200 | live |
status.concept.dev | Cloudflare (104.21.89.241) | 200 | status page |
app.concept.dev | 8.233.251.240 | 200 | live app |
api.concept.dev | 8.233.251.240 | 404 | up, no route on / |
auth.concept.dev | WorkOS → Cloudflare | 200 | WorkOS auth |
login.concept.dev | WorkOS → Cloudflare | 200 | WorkOS login |
oauth.concept.dev | WorkOS → Cloudflare | 307 | OAuth redirect |
qa-oauth.concept.dev | WorkOS → Cloudflare | 307 | OAuth redirect (QA) |
admin.concept.dev | WorkOS → Cloudflare | 404 | up, no route on / |
trust.concept.dev | VantaTrust → Cloudflare | 200 | trust/compliance page |
demo.concept.dev | 136.110.212.49 | 200 | live |
demo-api.concept.dev | 136.110.212.49 | 404 | up, no route on / |
qa.concept.dev | 8.233.118.247 | 200 | live QA |
qa-api.concept.dev | 8.233.118.247 | 404 | up, no route on / |
v.concept.dev | proxyhog.com → Cloudflare | 404 | up, no route on / |
filbert.concept.dev | 35.227.247.54 (GCP) | 404 | up, no route on / |
proof.internal.concept.dev | 34.117.235.94 (GCP) | 302 | redirects (auth-gated) |
session-inspector.internal.concept.dev | 8.232.15.183 | 302 | redirects (auth-gated) |
unleash.internal.concept.dev | 8.233.213.172 | 302 | Unleash feature-flag UI |
| Subdomain | Issue |
|---|---|
arena.internal.concept.dev | DNS resolves (35.244.252.201) but TLS handshake fails (SSL_ERROR_SYSCALL) — TCP open but no TLS response. Likely internal-only / firewalled. |
internal.concept.dev | No DNS (only the wildcard *.internal.concept.dev cert exists) |
liquidr.staging.concept.dev | No DNS |
staging-api.concept.dev | No DNS |
staging-app.concept.dev | No DNS |
workspace.concept.dev | No DNS |
workspace-api.concept.dev | No DNS |
workspace-demo.concept.dev | No DNS |
workspace-demo-api.concept.dev | No DNS |
workspace-qa.concept.dev | No DNS |
workspace-qa-api.concept.dev | No DNS |
workspace-* and staging-* hostnames only appear in CT logs (certs were issued June 2026) but have no public DNS — they're either internal-only, behind a private resolver, or decommissioned.arena.internal.concept.dev resolves but the TLS endpoint is unreachable from the public internet (likely IP-allowlisted)./ for the *-api hosts are expected — they're APIs that need a path; the host itself is up.Want me to probe specific paths on the API hosts, or check which live ones expose public endpoints (e.g. /health, /docs, /openapi.json)?
find the valid pages │ filbert.concept.dev │ 35.227.247.54 (GCP) │ 404 │ up, no route on /
The user wants me to find valid pages on filbert.concept.dev. Let me probe common paths to find what's actually served.
I'll probe common paths on filbert.concept.dev to find what's served.
{
"command": "B=\"https://filbert.concept.dev\"\nfor p in / /index.html /health /healthz /health-check /status /api /api/ /api/v1 /api/health /docs /docs/ /swagger /swagger.json /swagger-ui /swagger-ui.html /openapi /openapi.json /api-docs /redoc /graphql /graphiql /playground /robots.txt /sitemap.xml /manifest.json /favicon.ico /login /auth /admin /dashboard /app /v1 /v1/ /metrics /ping /ready /live /info /version /env /.well-known/ /.env /config /api/config /api/info /api/status /api/version /api/ping /api/metrics /api/v1/health /api/v1/status /api/v1/info /api/v1/version /api/v1/users /api/v1/metrics; do\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 5 --max-time 10 \"$B$p\")\n [ \"$code\" != \"404\" ] && [ \"$code\" != \"000\" ] && printf '%-30s %s\\n' \"$p\" \"$code\"\ndone",
"timeout": 300000
}/healthz 200 === Stopped waiting for output after 5.8 seconds. Command running in background with ID: f19748. Run get_output with timeout if you need to wait.
{
"shell_id": "f19748",
"timeout": 300000
}Exited with code 1 and no output Exit code: 1
Hmm, only /healthz returned 200. Let me explore more paths and also check what /healthz returns, and try a broader set of paths. Also try directory brute-force with a wordlist.
Only /healthz returned 200. Let me inspect its response and probe a broader set of paths.
{
"command": "echo \"=== /healthz body ===\"\ncurl -s --connect-timeout 5 --max-time 10 \"https://filbert.concept.dev/healthz\"\necho\necho \"=== headers ===\"\ncurl -sI --connect-timeout 5 --max-time 10 \"https://filbert.concept.dev/healthz\""
}Output from command in shell 71f6ac:
=== /healthz body ===
{"ok":true,"environment":"local"}
=== headers ===
HTTP/2 404
content-type: application/json; charset=utf-8
content-length: 32
date: Wed, 08 Jul 2026 10:18:24 GMT
via: 1.1 google
alt-svc: h3=":443"; ma=2592000
Exit code: 0Interesting - the body says `{"ok":true,"environment":"local"}` but the HEAD request returns 404. The GET returned 200 earlier. The `via: 1.1 google` header confirms it's behind Google Cloud Load Balancer. The `environment: local` is interesting - suggests this might be a misconfigured prod endpoint exposing local env, or just the default. Let me probe more paths - this looks like a JSON API. Let me try more API-ish paths and also check for common framework defaults (Next.js, Express, FastAPI, etc.).
It's a JSON API ({"ok":true,"environment":"local"}). Let me try more API paths and framework-specific routes.
{
"command": "B=\"https://filbert.concept.dev\"\nfor p in /api /api/ /api/v1 /api/v1/ /api/v2 /api/health /api/healthz /api/status /api/info /api/version /api/ping /api/users /api/me /api/auth /api/login /api/logout /api/config /api/metrics /api-docs /api/docs /api/swagger /api/openapi /v1 /v1/ /v1/health /v1/healthz /v1/status /v1/info /v1/users /v1/me /v1/auth /v2 /v2/ /users /me /auth /login /logout /register /signup /signin /health /status /info /version /ping /metrics /ready /live /config /env /debug /debug/health /debug/status /debug/pprof /debug/pprof/ /actuator /actuator/health /actuator/info /actuator/env /actuator/metrics /actuator/mappings /swagger.json /swagger.yaml /swagger-ui/ /swagger-ui/index.html /openapi.json /openapi.yaml /openapi/ /redoc /api-docs/ /docs/ /graphql /graphql/ /graphiql /playground /robots.txt /sitemap.xml /favicon.ico /manifest.json /.well-known/ /.well-known/security.txt /.well-known/openid-configuration /.env /.git/config /server-info /server-status /_next /_next/ /_next/data /_next/static /_status /_health /_ready /_live; do\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 5 --max-time 10 \"$B$p\")\n [ \"$code\" != \"404\" ] && [ \"$code\" != \"000\" ] && printf '%-40s %s\\n' \"$p\" \"$code\"\ndone\necho \"=== done ===\"",
"timeout": 300000
}No output produced after 5.0 seconds. Command running in background with ID: 1f6c7d. Run get_output with timeout if you need to wait.
{
"shell_id": "1f6c7d",
"timeout": 300000
}=== done === Exit code: 0
Only /healthz returned 200. Let me try a wordlist approach with common API endpoints. Let me also check the response body of the 404 to see if it gives hints about the framework.
Only /healthz. Let me inspect the 404 response body for framework hints and try a wordlist.
{
"command": "echo \"=== 404 body ===\"\ncurl -s --connect-timeout 5 --max-time 10 \"https://filbert.concept.dev/\" -i | head -30\necho\necho \"=== /healthz GET vs HEAD ===\"\ncurl -s --connect-timeout 5 --max-time 10 -X GET \"https://filbert.concept.dev/healthz\" -i | head -20"
}Output from command in shell 966ce6:
=== 404 body ===
HTTP/2 404
content-type: text/html; charset=UTF-8
content-length: 134
via: 1.1 google
date: Wed, 08 Jul 2026 10:18:56 GMT
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
<!doctype html><meta charset="utf-8"><meta name=viewport content="width=device-width, initial-scale=1"><title>404</title>404 Not Found
=== /healthz GET vs HEAD ===
HTTP/2 200
content-type: application/json; charset=utf-8
content-length: 33
date: Wed, 08 Jul 2026 10:18:57 GMT
via: 1.1 google
alt-svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
{"ok":true,"environment":"local"}
Exit code: 0The 404 page is a generic Google Cloud Load Balancer 404 (the `<!doctype html>...404 Not Found` is the GCLB default 404). But /healthz returns a custom JSON response - so the backend is serving /healthz but the GCLB is returning 404 for everything else that doesn't match a backend route. Wait, actually the /healthz response has no `via: 1.1 google` in the GET version but does in HEAD. Interesting. The /healthz is hitting the backend directly. The 404 for `/` is the GCLB default 404 (HTML), not the backend's 404. Actually wait - looking again: the 404 for `/` has `content-type: text/html` and a generic HTML 404 page. The /healthz has `content-type: application/json` and returns custom JSON. So /healthz is reaching the backend, but `/` is not routed to the backend (or the backend returns the GCLB default 404). Hmm, actually the GCLB default 404 is what you get when no backend service matches. But /healthz reaches a backend. This suggests the load balancer has a path matcher that only routes /healthz to the backend, and everything else goes to the default 404 bucket. OR, the backend itself is a minimal service that only has /healthz route. The 404 HTML page could be from the backend too. But the `via: 1.1 google` header is present on both, so both go through GCLB. Let me try a wordlist with common single-word paths. Let me also try things like /api/v1/healthz, /health, etc. more thoroughly. Also try POST methods. Let me use a proper wordlist if available.
The 404 is the Google Cloud Load Balancer default page. Only /healthz reaches the backend. Let me try a broader wordlist and method variations.
{
"command": "B=\"https://filbert.concept.dev\"\n# Common single-word and short paths\nfor p in health ready live startup probe liveness readiness readinessz healthz livez readyz startupz probez api v1 v2 v3 internal external public private status info version env config settings preferences options head get post put delete patch trace connect metrics stats statistics monitor monitoring ping pong test tests testing debug dev development staging prod production local localhost callback callbacks webhook webhooks hook hooks event events notify notification notifications queue queues job jobs task tasks worker workers cron crons schedule schedules batch batches import imports export exports upload uploads download downloads file files asset assets media image images photo photos video videos audio audio doc docs document documents report reports log logs audit audits billing billing invoice invoices payment payments subscription subscriptions plan plans customer customers user users account accounts profile profiles team teams org orgs organization organizations member members role roles permission permissions group groups token tokens key keys secret secrets cert certs certificate certificates domain domains site sites app apps application applications service services endpoint endpoints route routes function functions lambda lambdas worker workers process processes session sessions cookie cookies auth authenticate authentication authorize authorization oauth oauth2 oidc sso login logout signin signup register registration password reset mfa totp 2fa verify verification code codes challenge challenges captcha turnstile webauthn passkey passkeys magic magiclink link links email emails mail mails message messages sms notification notifications push push-notification alert alerts notice notices announcement announcements news feed feeds post posts comment comments like likes reaction reactions vote votes rating ratings review reviews feedback feedbacks contact contacts support helps help faq faqs question questions answer answers search searches query queries filter filters sort sorts order orders page pages view views template templates layout layouts theme themes style styles css js javascript script scripts image images icon icons logo logos banner banners hero heroes feature features widget widgets component components element elements block blocks section sections module modules plugin plugins extension extensions addon addons integration integrations connector connectors source sources destination destinations target targets source-of-truth sot golden record records entity entities model models schema schemas type types kind kinds category categories tag tags label labels attribute attributes property properties field fields column columns row rows table tables collection collections index indexes view views procedure procedures trigger triggers sequence sequences migration migrations seed seeds fixture fixtures test tests testing benchmark benchmarks perf performance profile profiles trace traces span spans metric metrics gauge gauges counter counters histogram histograms summary summaries export exports import imports backup backups restore restores archive archives snapshot snapshots clone clones copy copies paste pastes cut cuts undo undoes redo redoes history histories audit audits log logs event events activity activities action actions task tasks job jobs process processes workflow workflows pipeline pipelines stream streams channel channels topic topics queue queues exchange exchanges route routes binding bindings connection connections link links node nodes edge edges graph graphs tree trees forest forests leaf leaves root roots branch branches; do\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 4 --max-time 8 \"$B/$p\")\n [ \"$code\" != \"404\" ] && [ \"$code\" != \"000\" ] && printf '%-30s %s\\n' \"$p\" \"$code\"\ndone\necho \"=== done ===\"",
"timeout": 600000
}healthz 200 === Stopped waiting for output after 7.0 seconds. Command running in background with ID: 5bb5b0. Run get_output with timeout if you need to wait.
{
"shell_id": "5bb5b0",
"timeout": 600000
}Warning: requested timeout 10m exceeds maximum of 5m; clamping to 5m. === done === Exit code: 0
Only /healthz. Let me try a few more targeted things - maybe POST endpoints, or paths with the hostname "filbert" in them, or common health-check variants. Also try /healthz/ subpaths and method variations on /healthz. And try things like /api/healthz, /v1/healthz, etc. Also try OPTIONS to see allowed methods.
Only /healthz. Let me check method variations and probe a few more targeted paths.
{
"command": "B=\"https://filbert.concept.dev\"\necho \"=== OPTIONS / ===\"\ncurl -s -o /dev/null -w '%{http_code}\\n' -X OPTIONS --connect-timeout 5 --max-time 10 \"$B/\"\necho \"=== methods on /healthz ===\"\nfor m in HEAD POST PUT DELETE PATCH OPTIONS; do\n printf '%-8s ' \"$m\"\n curl -s -o /dev/null -w '%{http_code}\\n' -X \"$m\" --connect-timeout 5 --max-time 10 \"$B/healthz\"\ndone\necho \"=== /healthz subpaths & variants ===\"\nfor p in /healthz/ /healthz/check /healthz/db /healthz/redis /healthz/cache /healthz/queue /healthz/worker /healthz/all /healthz/deep /healthz/shallow /healthz/live /healthz/ready /healthz/startup /health /live /ready /startup /livez /readyz /startupz /api/healthz /api/health /api/v1/healthz /api/v1/health /v1/healthz /v1/health /_healthz /_health /_live /_ready /health-check /healthcheck /health_check /ping /pong /status /_status; do\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 4 --max-time 8 \"$B$p\")\n [ \"$code\" != \"404\" ] && [ \"$code\" != \"000\" ] && printf '%-30s %s\\n' \"$p\" \"$code\"\ndone\necho \"=== filbert-named paths ===\"\nfor p in /filbert /filbert/ /filbert/healthz /filbert/api /api/filbert /filbert/v1; do\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 4 --max-time 8 \"$B$p\")\n [ \"$code\" != \"404\" ] && [ \"$code\" != \"000\" ] && printf '%-30s %s\\n' \"$p\" \"$code\"\ndone\necho \"=== done ===\"",
"timeout": 120000
}=== OPTIONS / === 404 === methods on /healthz === HEAD 404 POST 404 PUT 404 DELETE 404 PATCH 404 OPTIONS 404 === /healthz subpaths & variants === === Stopped waiting for output after 6.0 seconds. Command running in background with ID: c098dd. Run get_output with timeout if you need to wait.
{
"shell_id": "c098dd",
"timeout": 120000
}=== filbert-named paths === === done === Exit code: 0
Interesting - only GET /healthz works. HEAD /healthz returns 404, all other methods return 404. This is very specific - it's a single GET-only /healthz endpoint. This looks like a Google Cloud Load Balancer with a serverless NEG or a path matcher that ONLY routes GET /healthz to a backend. The backend is likely a Cloud Run service or similar that only exposes /healthz. The `environment: local` in the response is interesting - it suggests the deployed service thinks it's running in "local" environment, which could be a misconfiguration or just the default for this service. Let me try a few more things: 1. Check if there's a trailing slash difference 2. Try common Cloud Run / GCP paths 3. Try case variations 4. Try with different Accept headers 5. Try /healthz with query params Actually, given that ONLY GET /healthz returns 200 and everything else (including HEAD /healthz) returns 404, this strongly suggests a Google Cloud Load Balancer URL map with a single path matcher for `GET /healthz` routing to a backend. The 404 for everything else is the GCLB default 404 bucket. Wait, but GCLB URL maps don't filter by method - they route by path. So HEAD /healthz should also reach the backend. The fact that HEAD returns 404 but GET returns 200 suggests the BACKEND is returning 404 for HEAD (not the GCLB). So the backend IS receiving requests, but only has a GET /healthz route. Hmm, but then why does `/` return the GCLB default 404 HTML page? Let me reconsider. The GCLB default 404 is `<!doctype html>...404 Not Found`. But actually, a backend could also return that. Let me look more carefully. Actually the 404 page `<!doctype html><meta charset="utf-8"><meta name=viewport content="width=device-width, initial-scale=1"><title>404</title>404 Not Found` - this is a very minimal 404 page. This could be from a Go server (net/http default 404 is `404 page not found`), or a custom minimal 404. The `via: 1.1 google` header is present on all responses, confirming GCLB is in the path. But GCLB passes through backend responses. Given that HEAD /healthz returns 404 but GET /healthz returns 200, the backend is definitely receiving the requests (GCLB routes by path, not method). The backend only has GET /healthz defined. So the backend is a minimal service with only GET /healthz. The 404 for `/` is coming FROM the backend (not GCLB default), since GCLB routes all paths to this backend. Wait, but if GCLB routes all paths to the backend, then the 404 for `/` would have the backend's 404 page. And indeed, the minimal HTML 404 could be the backend's default 404. Let me try some more exotic paths - maybe there are paths that aren't common words. Let me also try to fuzz with a wordlist file if available, and try common Go/Python/Node framework paths. Actually, I think I've been thorough enough. The service appears to only expose GET /healthz. Let me try a few more creative things: - /healthz with query strings - Common GCP/Cloud Run paths - /_gcp /_cloudrun - Maybe it's a webhook receiver - try /webhook with POST Let me also try to see if there are any redirects or interesting behavior with path traversal or encoding.
Only GET /healthz works (even HEAD /healthz returns 404). Let me try a few more creative approaches - query params, encoded paths, and common webhook/receiver patterns.
{
"command": "B=\"https://filbert.concept.dev\"\necho \"=== query params on /healthz ===\"\nfor q in \"?verbose=1\" \"?check=db\" \"?deep=true\" \"?format=json\" \"?detail=1\"; do\n printf '%-25s ' \"$q\"\n curl -s --connect-timeout 4 --max-time 8 \"$B/healthz$q\"\n echo\ndone\n\necho \"=== POST/PUT receivers ===\"\nfor p in /webhook /webhooks /hook /hooks /receive /ingest /ingestor /event /events /callback /callbacks /notify /notification /submit /submissions /intake /collector /collect /sink /processor /worker /queue /enqueue /dispatch; do\n for m in POST PUT; do\n code=$(curl -s -o /dev/null -w '%{http_code}' -X \"$m\" --connect-timeout 4 --max-time 8 \"$B$p\")\n [ \"$code\" != \"404\" ] && [ \"$code\" != \"000\" ] && printf '%-25s %-6s %s\\n' \"$p\" \"$m\" \"$code\"\n done\ndone\n\necho \"=== case & encoding ===\"\nfor p in /Healthz /HEALTHZ /healthZ /healthz%2f /%68%65%61%6c%74%68%7a /healthz. /healthz.json /healthz.xml /healthz.txt; do\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 4 --max-time 8 \"$B$p\")\n [ \"$code\" != \"404\" ] && [ \"$code\" != \"000\" ] && printf '%-25s %s\\n' \"$p\" \"$code\"\ndone\n\necho \"=== common GCP/cloud paths ===\"\nfor p in /_gcp /_cloudrun /_health /_ah/health /_ah/live /_ah/ready /_ah/start /ah/health /api/_healthz; do\n code=$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 4 --max-time 8 \"$B$p\")\n [ \"$code\" != \"404\" ] && [ \"$code\" != \"000\" ] && printf '%-25s %s\\n' \"$p\" \"$code\"\ndone\n\necho \"=== done ===\"",
"timeout": 180000
}=== query params on /healthz ===
?verbose=1 {"ok":true,"environment":"local"}
?check=db {"ok":true,"environment":"local"}
?deep=true {"ok":true,"environment":"local"}
?format=json {"ok":true,"environment":"local"}
?detail=1 {"ok":true,"environment":"local"}
=== POST/PUT receivers ===
===
Stopped waiting for output after 5.6 seconds. Command running in background with ID: dfbb11. Run get_output with timeout if you need to wait.{
"shell_id": "dfbb11",
"timeout": 180000
}=== case & encoding === /%68%65%61%6c%74%68%7a 200 === common GCP/cloud paths === === done === Exit code: 0
So the URL-encoded /healthz also works (which makes sense - the GCLB/backend decodes it). Nothing else. I've been very thorough. The service at filbert.concept.dev only exposes a single endpoint: `GET /healthz`. It returns `{"ok":true,"environment":"local"}`. All other paths, methods, and variations return 404. The `environment: "local"` is notable - it suggests this might be a misconfigured production deployment running with local environment settings, or it's a stub/placeholder service. Let me summarize the findings for the user.
I've thoroughly probed filbert.concept.dev. Here's what I found:
GET /healthzGET https://filbert.concept.dev/healthz
→ 200 {"ok":true,"environment":"local"}
I tested ~500+ paths across these categories:
| Category | Examples tested | Result |
|---|---|---|
| Health variants | /health, /live, /ready, /startup, /ping, /status, /_health, /_ah/health | 404 |
| API paths | /api, /api/v1, /api/healthz, /v1/healthz, /api/v1/health | 404 |
| Docs/Swagger | /docs, /swagger.json, /openapi.json, /redoc, /api-docs | 404 |
| Auth | /login, /auth, /oauth, /me, /users, /session | 404 |
| Webhooks/receivers | /webhook, /events, /callback, /ingest, /sink (POST + PUT) | 404 |
| Static files | /robots.txt, /sitemap.xml, /favicon.ico, /manifest.json | 404 |
| Framework defaults | /_next/, /actuator/health, /graphql, /.well-known/ | 404 |
| Case/encoding | /Healthz, /HEALTHZ, /%68%65%61%6c%74%68%7a | 404 (encoded → 200, same endpoint) |
| Method variations | HEAD, POST, PUT, DELETE, PATCH, OPTIONS on /healthz | 404 |
GET-only: Even HEAD /healthz returns 404 — the backend only registers a GET /healthz handler.environment: "local": The service reports its environment as "local" in production, which suggests either:
ENV env var on the GCP Cloud Run service)via: 1.1 google) → GCP service (35.227.247.54). The minimal 404 HTML page (<!doctype html>...404 Not Found) comes from the backend itself, not GCLB's default./healthz?verbose=1, ?deep=true, etc. all return the same static response — no deeper health checks exposed.filbert.concept.dev appears to be a minimal/placeholder Cloud Run service exposing only a single health-check endpoint. There are no other valid public pages or API routes on it. The "environment":"local" value is worth flagging to whoever owns this service — it likely should be "production".