coograph-debug

coograph-debug is a skill for Claude Code from paullukic/coograph. It costs 52 tokens per session (1,362 once invoked), scanned A, original, MIT.

A bug-fixing workflow that investigates a failing build, test, or running program, then applies the smallest suitable fix. It checks the result and stops after three unsuccessful attempts.

In plain words
What is it for?
Use it for build errors, failed tests, and runtime bugs that need reproduction, evidence gathering, a code change, and verification.
Why use it?
It provides a defined way to find the underlying cause instead of making unrelated changes. It also verifies whether the fix resolved the problem.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: mentions AGENTS.md.

Part of the coograph plugin — 5 skills shipped together

Good fit Use it for build errors, failed tests, and runtime bugs that need reproduction, evidence gathering, a code change, and verification.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/paullukic/coograph/coograph-debug
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.

Any agent
npx skills add paullukic/coograph --skill coograph-debug
Clone the repo
git clone --depth 1 https://github.com/paullukic/coograph

Made for: Claude Code.

Or install coograph, the plugin that ships this one along with the rest of its 5 skills.

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 coograph-debug

README.md
[![agentmods](https://agentmods.dev/badge/skills/paullukic/coograph/coograph-debug/github.svg)](https://agentmods.dev/skills/paullukic/coograph/coograph-debug)
Your own site
<a href="https://agentmods.dev/skills/paullukic/coograph/coograph-debug"><img src="https://agentmods.dev/badge/skills/paullukic/coograph/coograph-debug/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 coograph-debug

Your own site · 80×15
<a href="https://agentmods.dev/skills/paullukic/coograph/coograph-debug"><img src="https://agentmods.dev/badge/skills/paullukic/coograph/coograph-debug.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,362 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 $0.00052 $0.01362
Opus 5.5 $0.00021 $0.00545
Sonnet 5.5 $0.00010 $0.00272
Haiku 4.5 $0.00005 $0.00136

Measured 9d ago against content hash bd10787eded7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

coograph-debug 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 9d 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.

plugin/skills/coograph-debug/SKILL.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Diagnose the bug or build error below. Find the root cause with minimal investigation, then apply the smallest possible fix.

Phase 0 — Orient with Code-Graph (MANDATORY — non-negotiable)

Before reading any file or running any search, this is the HARD RULE — code-graph first, no exceptions:

  1. Call get_minimal_context(task="debug <symptom>") then detect_changes(). ALWAYS start here. Use detect_changes() risk scores first — recent high-risk changes are the most likely culprit. Use the returned file list to focus investigation.
  2. Fall back to sqlite3 .code-graph/graph.db ONLY when the MCP code-graph server is not registered (tools literally do not exist) OR every attempted MCP call returned an error.
  3. Fall back to standard search/read tools ONLY when Step 1 AND Step 2 are both impossible because the code-graph DB is absent from the workspace.

"Slow", "unwieldy", "it's a simple bug" are NOT valid reasons to bypass. When tracing call chains use query_graph("callers_of", fn) and query_graph("callees_of", fn) before reading files. Validate every hypothesis directly in source regardless of graph output.

Protocol

For Runtime Bugs

  1. REPRODUCE: Can you trigger it reliably? What is the minimal reproduction? Consistent or intermittent?
  2. GATHER EVIDENCE (parallel when possible):
    • Read full error messages and stack traces — every word, not just the first line.
    • Check recent changes: git log --oneline -10, git blame on suspect lines.
    • Find working examples of similar code in the codebase.
    • Read the actual code at error locations.
  3. HYPOTHESIZE: Compare broken vs working code. Trace data flow from input to error. Document one hypothesis before investigating further. Identify what test would prove/disprove it.
  4. FIX: Apply ONE change. Predict the test that proves the fix. Check for the same pattern elsewhere.
  5. VERIFY: Run the failing test/build to confirm the fix works. Verify no regressions.

For Build/Compilation Errors

Read the full file on GitHub · 107 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. 9d ago Changed · +3 lines bd10787eded7
  2. 25d ago Changed · +15 lines 740a0451423a
  3. 1mo ago First seen · 89 lines · 52 tokens per session scan A d54356504e3d

Subscribe to this mod's changes

coograph-debug is a skill published in the GitHub repository paullukic/coograph (17 stars, last pushed 9d ago), licensed MIT. It adds 52 tokens to every session and 1,362 once invoked, about $0.0002 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 2026-09-16.

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