Ca Checkpoint Agent Skill

/ca-checkpoint — codebase sweep

Periodic sweep of the entire codebase with the reviewer fleet, funneled to a single dated report. Surfaces findings — not a promotion gate, enforces no sign-off.

Flow

• Build the unit list — the same fleet as /ca-review, scoped to the whole codebase against the

<project-root>/.codearbiter/ docs:

| Reviewer | Reads |

|---|---|

| security-reviewer | security-controls.md; reviews security posture |

| auth-crypto-reviewer | security-controls.md; authn/crypto/key/secret paths |

| dependency-reviewer | dependency manifests; license + supply-chain posture |

| migration-reviewer | migration history; safety + classification |

| coverage-auditor | test coverage vs. obligations across the tree |

| architecture-drift-reviewer | decisions/; drift between code and accepted ADRs |

• Route to dispatching-parallel-agents with that unit list (read-only batch). It dedupes, then

funnels through finding-triage → checkpoint-aggregator.

• checkpoint-aggregator writes the dated report to

<project-root>/.codearbiter/checkpoints/YYYY-MM-DD.md: findings by severity with

file:line, and out-of-scope items marked inline [NEEDS-TRIAGE].

• Write the current override count to <project-root>/.codearbiter/last-checkpoint — the

integer baseline the startup briefing subtracts for its overrides-since-checkpoint counter. The value is

the number of non-comment, non-blank lines in overrides.log at this moment (0 if the log is

absent). This re-zeros the over:N segment until the next /ca-override. Write a bare integer,

not a timestamp — the briefing treats any value above the current total as stale and falls back

to showing every override.

• Report the checkpoint path.

Hard gate

Read-only except writing the checkpoint doc and last-checkpoint — MUST NOT modify code. MUST NOT

consume raw reviewer output — only the finding-triage → checkpoint-aggregator verdict. MUST NOT

resolve a [CONFIRM-NN] surfaced during the sweep by guessing. The report surfaces findings; it does

not block or sign off anything.

When NOT to use

• Reviewing just the current diff → /ca-review.
• A pre-implementation threat model → /ca-threat-model.
• ADR health only → /ca-adr-status.
• A whole-codebase deep audit → /ca-tribunal (checkpoint is the lean periodic sweep; tribunal its rare deep counterpart).