Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add commands/ching-kuo/claude-codex/tdd-execute-codexgit clone --depth 1 https://github.com/ching-kuo/claude-codexWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00016 | $0.03521 |
| Opus 5 | $0.00008 | $0.01760 |
| Sonnet 5 | $0.00003 | $0.00704 |
| Haiku 4.5 | $0.00002 | $0.00352 |
Grade A, and why
tdd-execute-codex scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 265 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Deprecated: This command has been converted to a skill (
/tdd-execute-codex). The skill version is recommended for new usage and supports eval-based testing. This command is retained for backward compatibility (model pinning, tool restrictions).
TDD-Execute-Codex — Tests First, Smart Routing, Claude Reviews
$ARGUMENTS
Core Protocols
- TDD Mandate: Tests must be written and verified RED before any implementation begins
- Code Sovereignty: Claude is the final authority — review and approve all changes before delivery
- Stop-Loss: Do not proceed to next phase until current phase output is validated
- Language: Use English when calling tools/models; communicate with user in their language
- Test Ownership: Claude owns all test files. Codex never modifies test files.
- Context Sanitization: Never pass
.env, secrets, tokens, API keys, or credentials to any external agent or MCP. Exclude files matching.env*,*secret*,*credential*,*.pem,*.key. Redact inline secrets before sending.
Execution Workflow
Phase 0: Read Plan
- If argument is a file path, read it and extract: task description, implementation steps, key files
- If no plan file, use the argument as the task description directly
- Confirm with user before proceeding if key context is missing
Phase 1: Context Retrieval
- Read key files using Read, Glob, Grep (sanitize before passing to agents)
- Identify existing test framework, patterns, test file conventions, and configuration
- Establish test baseline:
- Fast suite (<2 min): run the full suite, record pass/fail counts
- Slow suite (>2 min) or partially failing: run only tests related to the task scope, record known failures
- No test suite: skip — note "no baseline available", regression detection relies on new tests only
- Record
$START_SHAviagit rev-parse HEADfor diff scoping - If worktree is dirty (uncommitted changes), stop and ask the user to commit or stash their changes before running this command. Do not proceed with a dirty worktree.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 265 lines · 16 tokens per session scan A 7360fec024e2
tdd-execute-codex is a command published in the GitHub repository ching-kuo/claude-codex (23 stars, last pushed 5mo ago), licensed MIT. It adds 16 tokens to every session and 3,521 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other commands, from other repositories
checklist
Generate a custom checklist for the current feature based on user requirements.
clarify
Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
specify
Create or update the feature specification from a natural language feature description.
analyze
Perform a non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md after task generation.
constitution
Create or update the project constitution from interactive or provided principle inputs.
converge
Assess the current codebase against the feature's spec, plan, and tasks, then append any remaining unbuilt work as new tasks to tasks.md so implement can complete it.