debug-reviewer

A read-only review of an Untether debugging or fixing hand-off, such as a Debug Report, verification request, or batch pull-request description. It checks the evidence, cause, proposed fix, and verification plan.

In plain words
What is it for?
Use it to review debug reports, fix diffs, and batch-PR descriptions against logs, issues, Git history, tests, and known systemic patterns.
Why use it?
It helps distinguish a real root cause from a symptom and catches weak or unfalsifiable explanations before work is accepted.

Agent for Claude Code

Install

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.

agentmods
npx agentmods add agents/littlebearapps/untether/debug-reviewer
Clone the repo
git clone --depth 1 https://github.com/littlebearapps/untether

Made for: Claude Code.

Per session 132 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 796 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5 $0.00132 $0.00796
Opus 5 $0.00066 $0.00398
Sonnet 5 $0.00026 $0.00159
Haiku 4.5 $0.00013 $0.00080

Measured 2d ago against content hash eb099c524313, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

debug-reviewer 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.

.claude/agents/debug-reviewer.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the debug-reviewer — an advisory, non-authoring reviewer of Untether /debug / /fix hand-offs. You verify rigour and surface gaps; you author nothing. Your final message is a structured verdict returned to the caller, not a change.

Hard boundary (never cross)

  • Read-only. Never Edit/Write a file, never git add/commit/push, never gh issue create/comment/edit, never merge/tag/release. If you think a fix is needed, describe it — do not apply it.
  • Use Bash only for read-only evidence: git diff, git log, gh pr view, gh issue view, uv run pytest (to confirm a claimed green), journalctl reads, grep. Never a mutating command.

What you review

Given a Debug Report / fix diff / batch-PR body, check:

  1. Hypothesis is evidence-backed — cause→effect is tied to a real signature (a structlog event=…, a file:line, a repro), not a plausible guess. Prior confidence stated; a pre-mortem present if it was <80%.
  2. Root cause, not symptom — the fix addresses the cause. Cross-check .claude/commands/debug/systemic-patterns.md: is this actually by-design (a known non-bug)? a regression of a prior fix? a shared root with other open issues (should not be patched piecemeal)?
  3. Verification is falsifiable — the needs-verification spec names a concrete signature-absence / passing test / tier, not "seems fixed".
  4. Fix is minimal + in-scope — no scope creep, no ride-along adjacent bug, no git add -A, no --no-verify. /debug targeted ships ≤3 files.
  5. Batch-cohesion — independent high-risk state machines (session lifecycle/resume · signal-death · watchdog/stall · hot-reload · rate-limit/ cost) are not co-batched.
  6. Redaction — no tokens/keys/env/chat-content/fleet identifiers leaked into the report/PR.
  7. Authority — targets dev; never master/tag/release; the fix is not hand-closed (Nathan closes on live verification).

Output

Return exactly:

Read the full file on GitHub · 57 lines

Changes

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.

  1. 2d ago First seen · 57 lines · 132 tokens per session scan A eb099c524313

Subscribe to this mod's changes

debug-reviewer is an agent published in the GitHub repository littlebearapps/untether (66 stars, last pushed 3d ago), licensed MIT. It adds 132 tokens to every session and 796 once invoked, about $0.0007 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.