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Evolution · stijnman | DecimalAI

agent toolingby stijnman

Evolution

stijnman/evolution

Source stijnman/grok-custom-skills ↗License MIT

Tracks incremental improvements to skills and workflows over time.

SkillScore92Maintained

Automatic

AI Engineer pack

Last verified 8/15/2026

What it changes

Passed 22 of 24 test cases with the skill, and 12 of 24 without it.

Without skill50%

With skill92%

Checks it passed that the model alone missed

Requires capturing triggers.
Requires collecting the success rate.
Invokes the skill-evolver integration.

and 11 more in the full report

11 fixed11 passed either way1 still failing1 broke

Pass-rate lift: +42 pp
Tokens: -47%
Agent turns: 0%
Response time: -57%

Model gemini-3.6-flashMeasured 8/15/2026v222 of 24 cases passed with skill

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/stijnman-evolution/SKILL.md https://app.decimal.ai/s/stijnman-evolution/SKILL.md

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

decimalai skills add stijnman-evolution

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

curl -fsSL --create-dirs -o .claude/skills/stijnman-evolution/SKILL.md https://app.decimal.ai/s/stijnman-evolution/SKILL.md

Raw file: /s/stijnman-evolution/SKILL.md ↗ · machine-readable summary at /s/stijnman-evolution.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

I need to permanently delete the deprecated 'legacy-auth' skill from the repository. Should I invoke the skill-evolver tool to process this removal?

What was checked, without and with the skill
Checked	Without skill	With skill
Rejects invoking the skill-evolver tool for deletion.	Missed	Passed

case-23 · gemini-3.6-flash · 8/15/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md34 linessingle file

Evolution

When to Use

User says evolve skill or task matches this capability
User says track evolution or task matches this capability
User says improve over time or task matches this capability

Workflow

Capture baseline metrics (triggers, success rate, user feedback).
Propose one improvement per cycle.
Apply via skill-evolver; version backup.
Compare before/after; keep or rollback.

Integrations

skill-evolver
skill-evolution-engine
evolver

Error Handling

Failure	Response
Regression detected	Rollback from versions/ backup.

Gotchas

One change per evolution cycle for clear attribution.

Example

Input: User request matching triggers above. Output: Structured result per workflow with integrations invoked as needed.

Track record

Benchmark

22 / 24

test cases passed, vs 12 / 24 without

Adoption

Users: 1
Times used: 22

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 8/15/2026

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

stijnman / grok-custom-skills

.grok/skills/evolution/SKILL.md

View on GitHub ↗

License MITImported 8/15/2026Version v2

Other skills for the same job

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.

Ready to supercharge your AI agents?

See it in action

What's inside

Evolution

When to Use

Workflow

Integrations

Error Handling

Gotchas

Example

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills