fidelity-auditor

Status: shipped-beta · Ships to: npm lane — delivered into the consumer's .claude/agents/ by the setup delivery loop (setup.d/20-agents.sh:24) · Fires at: dispatched as a Claude Code sub-agent (frontmatter name:; the session's agent list carries its one-line description)

What it is

"> Authoritative for: the fidelity-audit protocol — inputs, question, output grammar." (agents/fidelity-auditor.md:19). Class B detection layer of the acceptance contour: "> Class: B — the named cold-agent detection layer of the acceptance contour" with "> the fail-closed transport is the pr-body-fidelity CI gate" (agents/fidelity-auditor.md:11-14). Fires "> Fires: at every stage-PR boundary — /harvest §4 fidelity step, /dispatcher §2.4" pre-egress gate, night-mode PR-gate (agents/fidelity-auditor.md:17-18). One question: "is this diff WHAT the" kickoff asked for (agents/fidelity-auditor.md:35-36) — design altitude only, never code quality.

How it works

• "## Role — cold by construction" (line 32): "You are a COLD design-altitude acceptance auditor. You never saw the design dialogue or the" implementation session (agents/fidelity-auditor.md:34).
• "## Inputs (paths/text only — never chat context, never implementation logs)" (line 45): "1. The kickoff/spec path (the sole statement of intent — if something was agreed but is not in" that file, it cannot know it (line 47); the full 3-dot diff (line 51); audited SHA + round (line 52).
• "## Protocol" (line 54): read the kickoff fully — "1. Read the kickoff/spec fully. Extract the deliverables list, the declared descopes" (line 56); map every deliverable to diff evidence (line 58); "3. Report three drift lists, each entry with file:line evidence:" (line 59) — missing / "extra — present in the diff, not asked (scope creep; check the kickoff's out-of-scope" (line 61) / diverged; ambiguous kickoffs get flagged not graded (line 64).
• "## Output grammar (mandatory, machine-consumed)" (line 73): "FIDELITY: GO | REVISE | STOP" (line 76); "Verdict rule: any BLOCKER → STOP. Any MAJOR missing/diverged → REVISE. Only MINOR or clean →" GO (line 87); single-block invariant — "The PR body carries exactly ONE" ## Fidelity verdict section, rework replaces, never appends (lines 100-104).
• "Severity contract (reviewer-discipline.md §6):" gates which findings may trigger a round (line 91).

Satellites & companions

• USES: the pr-body-fidelity gate as transport (line 13) and reviewer-discipline §6 severity contract + §6.1 triage rubric (lines 91, 98).
• ADAPTS: the GO/REVISE/STOP vocabulary — line 30: "> vocabulary** per dispatch-input-checker.md §Output grammar alignment.".
• ADDS: the machine-consumed FIDELITY verdict block and the Watch-list: "Every round emits a ### Watch-list sub-block below the verdict, including on GO: on GO" the items are what a later round must not undo (line 113).
• Census family satellites: peer cold auditors C7 (docplan-auditor — PR-blind vs this agent's dialogue-blind contract) and C5 (claims-conformance-auditor).

Anchors

• agents/fidelity-auditor.md:2 — name: fidelity-auditor
• agents/fidelity-auditor.md:3 — description: Cold WHAT-conformance acceptance audit at a stage-PR boundary. Given ONLY the kickoff/spec (or a scoped section of it) and the 3-dot diff …
• agents/fidelity-auditor.md:19 — > **Authoritative for:** the fidelity-audit protocol — inputs, question, output grammar.
• agents/fidelity-auditor.md:32 — ## Role — cold by construction
• agents/fidelity-auditor.md:45 — ## Inputs (paths/text only — never chat context, never implementation logs)
• agents/fidelity-auditor.md:59 — 3. Report three drift lists, each entry with file:line evidence:
• agents/fidelity-auditor.md:76 — FIDELITY: GO | REVISE | STOP
• agents/fidelity-auditor.md:87 — Verdict rule: any BLOCKER → STOP. Any MAJOR missing/diverged → REVISE. Only MINOR or clean →
• agents/fidelity-auditor.md:100 — **Single-block invariant (enforced by the gate).** The PR body carries exactly ONE
• agents/fidelity-auditor.md:113 — Every round emits a ### Watch-list sub-block below the verdict, **including on GO**: on GO
• setup.d/20-agents.sh:24 — for f in "$PKG_ROOT"/agents/*.md; do

All anchors at framework pin b069c59328aa8e08671d3a19fd25efa618dfc1c5 (fetched 2026-09-11 from artyhoo/getff staging; ancestry of census pin a1337cb301 verified).