untether: Agent for Claude Code

.claude/agents/debug-reviewer.md

debug-reviewer is an agent for Claude Code from littlebearapps/untether. It costs 132 tokens per session (796 once invoked), scanned A, original, MIT.

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

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths.

This is littlebearapps/untether's own configuration. It tells Claude Code how to work on untether itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything untether configures →

Reuse

Borrowing it

Nothing to install: this file belongs to littlebearapps/untether. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/littlebearapps/untether/master/.claude/agents/debug-reviewer.md
Clone the repo
git clone --depth 1 https://github.com/littlebearapps/untether

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for debug-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/littlebearapps/untether/debug-reviewer/github.svg)](https://agentmods.dev/agents/littlebearapps/untether/debug-reviewer)
Your own site
<a href="https://agentmods.dev/agents/littlebearapps/untether/debug-reviewer"><img src="https://agentmods.dev/badge/agents/littlebearapps/untether/debug-reviewer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for debug-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/littlebearapps/untether/debug-reviewer"><img src="https://agentmods.dev/badge/agents/littlebearapps/untether/debug-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
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. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00132 $0.00796
Opus 5.5 $0.00053 $0.00318
Sonnet 5.5 $0.00026 $0.00159
Haiku 4.5 $0.00013 $0.00080

Measured 1mo ago against content hash eb099c524313, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 1mo 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. 1mo 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 (74 stars, last pushed today), licensed MIT. It adds 132 tokens to every session and 796 once invoked, about $0.0005 per session on Opus 5.5. 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.