[Hackathon] Codex skill detection should require a complete TestSprite managed section

[ahndohun]

[Hackathon] Codex skill detection should require a complete TestSprite managed section

Summary

PR: #90

The TestSprite CLI currently treats a Codex AGENTS.md managed section as installed when it sees only the TestSprite BEGIN marker. If the managed block is truncated or half-written and the END marker is missing, the CLI can suppress the missing-skill warning even though Codex does not have a complete TestSprite verification skill installed.

This issue is a review-routing companion for PR #90. The implementation already exists as a small PR; the goal here is to make the Track B / CLI Improvement Bonus entry easy for maintainers to find and evaluate.

Why It Matters

This affects the agent verification loop directly. A partial AGENTS.md section is most likely after interrupted writes, merge conflicts, manual edits, or failed setup. In that state the CLI should nudge the user to repair the TestSprite verification skill, not silently accept the partial marker.

Fix

PR #90 updates the Codex managed-section target so it requires:

• <!-- BEGIN TESTSPRITE AGENT SECTION -->
• a later <!-- END TESTSPRITE AGENT SECTION -->

The patch is intentionally small: one production helper and a focused regression test.

Verification

• RED first: the partial-section regression test failed before the production fix.
• GREEN: focused skill-nudge test, format check, typecheck, lint, e2e, and full suite evidence are in the PR package.
• Manual CLI surface: a truncated AGENTS.md emits the missing-skill warning.
• Current status: PR fix(skill-nudge): require complete Codex managed section #90 is open, mergeable, and review-required. The only current same-file queue risk I found is feat(agent): add Gemini CLI install target #57, but that PR is a larger Gemini CLI install target currently CONFLICTING/DIRTY; PR fix(skill-nudge): require complete Codex managed section #90 remains the smaller merge unit for this Codex managed-section correctness bug.
• TestSprite MCP evidence: tools/list returns the current MCP tool surface; earlier MCP-generated code summary and standardized PRD artifacts are retained in the evidence package.

Evidence package:

#90

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Discord Username / User ID

ahndohun

Confirmations

• I have searched existing issues and this is not a duplicate.
• I have provided my Discord identity above for reward coordination.