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Execute · ganyuanran | DecimalAI

codingby ganyuanran

Execute

ganyuanran/systematic-debugging

Source ganyuanran/aegis ↗License MIT

Use when encountering a bug, test failure, or unexpected behavior, before proposing fixes

SkillScore77Maintained

Automatic

Coding pack

Last verified 9/9/2026

What it changes

Passed 15 of 19 test cases with the skill, and 10 of 19 without it.

Without skill50%

With skill77%

Checks it passed that the model alone missed

Output includes a Repair closure section.
Output includes a Retirement closure section.
Output directs continuing investigation upward to the canonical owner.

and 5 more in the full report

7 fixed10 passed either way4 still failing1 broke

Pass-rate lift: +27 pp
Tokens: +88%
Agent turns: 0%
Response time: -28%

Model Measured 9/9/2026v4 · latest is v617 of 22 cases passed with skill · 19 comparable

Tokens, turns and time describe resource use, not a dollar price.

This benchmark measured an earlier version of the skill.

A newer attempt on gemini-3.8-flash on 10/19/2026 did not produce a publishable comparison (not comparable). The snapshot above is the previously measured run.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/ganyuanran-systematic-debugging/SKILL.md https://app.decimal.ai/s/ganyuanran-systematic-debugging/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add ganyuanran-systematic-debugging, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/ganyuanran-systematic-debugging/ and pins it in .decimal/skills.lock

decimalai skills add ganyuanran-systematic-debugging

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/ganyuanran-systematic-debugging/SKILL.md https://app.decimal.ai/s/ganyuanran-systematic-debugging/SKILL.md

Raw file: /s/ganyuanran-systematic-debugging/SKILL.md ↗ · machine-readable summary at /s/ganyuanran-systematic-debugging.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 7 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 7

Prompt

A single typo in a status message string in `notification_service.py` displays 'Succesfull'. No shared logic, contracts, or cross-module boundaries are involved. Demonstrate the compact readback format suitable for this scenario.

What was checked, without and with the skill
Checked	Without skill	With skill
Output uses the compact quick bug lane readback structure containing Symptom, Reproduction, Root Cause, Change Necessity, Fix Boundary, and Verification.	Missed	Passed

case-13 · gemini-3.6-flash · 9/9/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md197 linessingle file

Execute

Bug, failure, or unexpected behavior:

Isolate — read error, reproduce, inspect the diff, and drill upward through diagnostic layers: L1 symptom → L2 logic → L3 system → L4 architecture → L5 cross-system contract → L6 platform → L7 spec gap. Layers are observation altitudes, not one causal chain; the causal shape at the stop altitude is classified explicitly before any root claim. Stop only when causal proof accounts for the recurrence generator or reaches a T-class boundary.
Identify owner — compare working behavior, trace the bad value, locate the canonical owner, and treat duplicate owners as a finding.
Decide before editing — Before fixing, run Patch-Shape Triage and Ripple Signal Triage when shared logic, contracts, fallbacks, adapters, producer/consumer seams, or source-of-truth boundaries are involved. Surface Change Necessity for any new source-code path or non-trivial source edit. Run Minimality Check for a new branch, fallback, adapter, owner, or compatibility path, and Pre-Edit Complexity Check for an overloaded owner or complexity growth. After Change Necessity selects code-change and before the first repair edit, own the TDD Route for the repair slice per test-driven-development (off default; strict on behavior/bugfix/shared/contract/persistence/permission/migration risk).
Prove — test one hypothesis with the smallest reproduction or verification. A failing test first is required only by a recorded TDD Route: strict; with TDD Mode: off, do not require a failing test or RED/GREEN cycle. Three failed fixes means stop and question architecture.
Repair and close — fix minimally at the canonical owner, verify in proportion to risk, review architecture, and close both repair and retirement tracks. If any symptom remains, stop and diagnose it separately.

Done: confidence ≥ B, causal status matches recurrence evidence or an external terminal, tracks explicit, no H signal, and required D evidence passes.

Core invariant

Find root cause and fix the bug class at its canonical owner. A minimal fix is not the smallest textual diff; it is the smallest sufficient owner-level repair.

Quick bug lane

For a low-risk, reproducible, single-owner bug with no patch-shape signal, keep

Track record

Benchmark

15 / 19

test cases passed, vs 10 / 19 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v6 — 10/16/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

ganyuanran / aegis

skills/systematic-debugging/SKILL.md

View on GitHub ↗

License MITImported 10/16/2026Version v6

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Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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See it in action

What's inside

Execute

Core invariant

Quick bug lane

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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