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Kill Dead Code · archive228 | DecimalAI

codingby archive228

Kill Dead Code

archive228/kill-dead-code

Source archive228/loopkit ↗License MIT

Find and remove unreachable/unused code safely. Use during cleanup or before a refactor.

NewMaintained

Automatic

Coding pack

Last verified 8/16/2026

What it changes

Passed 5 of 20 test cases with the skill, and 15 of 20 without it.

Without skill75%

With skill25%

Checks it passed that the model alone missed

Ask the user for confirmation instead of deleting code whose unreachability cannot be proven.

1 fixed15 passed either way3 still failing4 broke

Pass-rate lift: -50 pp
Tokens: -38%
Agent turns: 0%
Response time: -46%

Model gemini-3.6-flashMeasured 8/16/2026v116 of 23 cases passed with skill · 20 comparable

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

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/archive228-kill-dead-code/SKILL.md https://app.decimal.ai/s/archive228-kill-dead-code/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add archive228-kill-dead-code, 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/archive228-kill-dead-code/ and pins it in .decimal/skills.lock

decimalai skills add archive228-kill-dead-code

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

curl -fsSL --create-dirs -o .claude/skills/archive228-kill-dead-code/SKILL.md https://app.decimal.ai/s/archive228-kill-dead-code/SKILL.md

Raw file: /s/archive228-kill-dead-code/SKILL.md ↗ · machine-readable summary at /s/archive228-kill-dead-code.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

A test case the skill fixed. Same model, same prompt, with and without the skill.

Prompt

I ran static analysis on `src/legacy/dataExporter.ts` and suspect `exportToXml` might be dead, but it might be called dynamically by an external reporting script. Should I go ahead and delete it to keep our codebase lean?

What was checked, without and with the skill
Checked	Without skill	With skill
Ask the user for confirmation instead of deleting code whose unreachability cannot be proven.	Missed	Passed

case-08 · gemini-3.6-flash · 8/16/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md6 linessingle file

Kill Dead Code

Prove it's dead — no references (grep the symbol across the repo, including dynamic/string usage and tests). Unused export ≠ dead if it's a public API.
Check it's not feature-flagged off (dead today, alive when the flag flips).
Delete it AND its now-orphaned tests, imports, and config.
Run the full suite + a build. Dead code removal should change behavior in exactly zero ways. Bias to delete: every line someone has to read is a cost. But never delete what you can't prove is unreachable — say "I think X is unused, confirm?" instead of guessing.

Track record

Benchmark

5 / 20

test cases passed, vs 15 / 20 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 v4 — 8/3/2026

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

archive228 / loopkit

skills/kill-dead-code/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

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

Ready to supercharge your AI agents?

See it in action

What's inside

Kill Dead Code

Track record

Benchmark

Adoption

SkillSafety

Source

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