skill-refiner · git:20260916.52ec743 · 2026-09-16 · sha256 099f7774137712f9
skill-refiner git:20260916.52ec743A
Immutable. This exact content never changes and is served at /api/v1/blob/099f7774137712f9.
---
name: skill-refiner
description: >
· Improve skills through repeated scoring, behavioral tests, and peer review toward a requested quality target.
license: MIT
compatibility: "Requires: skill-creator skill, git. Optional: secondary AI harness (codex, claude, gemini, opencode) for cross-model review"
metadata:
source: iuliandita/skills
date_added: "2026-03-31"
effort: high
argument_hint: "[iterations]"
---
# Skill Refiner: Iterative Self-Improvement Loop
Adaptive evaluation loop for AI skill collections, inspired by Karpathy's AutoResearch.
Orchestrates repeated score-improve-verify cycles using **skill-creator** as the engine
and mandatory peer review as an adversarial check (cross-model when distinct model identity
is verified, fresh-context self-review as the minimum fallback).
## When to use
- Batch-improving the entire skill collection after a period of manual edits
- Targeted improvement of one named skill when the user explicitly asks for skill-refiner,
multiple iterations, a score target, or "no ceiling" polish
- Running quality sweeps before a release or publish
- Triggering a self-improvement cycle where skills bootstrap each other
- After adding several new skills that need polish and consistency alignment
- When cross-model perspective would catch single-model blind spots
- Periodic maintenance: scheduled improvement runs to keep skills current
## When NOT to use
- Creating a new skill from scratch - use **skill-creator** (Mode 1)
- Single-pass review of one skill without iteration, scoring, or peer review - use **skill-creator** (Mode 2)
- One-off collection audit without iteration - use **skill-creator** (Mode 3)
- Full codebase review (code, not skills) - use **full-review**
- Style/slop audit on application code - use **anti-slop**
## Configuration
```
skill-refiner [--iterations N] [--mode MODE] [--secondary HARNESS] [--threshold N] [--plateau N] [--meta]
```
| Flag | Default | Description |
|---|---|---|
| `--iterations` | 10 | Maximum iterations for phase 1 |
| `--mode` | circuit-breaker | `auto`, `circuit-breaker`, or `step` |
| `--secondary` | auto-detect | Secondary review harness, or `none`; model identity determines the penalty cap |
| `--threshold` | 85 | Focus threshold - skip skills scoring above this; hard cap 95, not overridable |
| `--plateau` | 2 | Minimum lower-bound composite delta to keep a change or keep iterating |
| `--meta` | off for single-skill runs | Run phase 2 (meta-improvement) for a single named-skill run, which otherwise stops after phase 1. Collection-wide runs enter phase 2 by default and ignore this flag. |
**Environment override:** `SKILL_REFINER_SECONDARY=<harness>` (CLI flag takes precedence)
### Checkpoint Modes
**circuit-breaker** (default): runs autonomously, auto-pauses on score regression,
contested major flags, or plateau. Always pauses before phase 2.
**auto**: fully autonomous through phase 1. Still pauses before phase 2 and on
contested major flags (non-configurable).
**step**: pauses after every iteration for manual review. Best for first run or learning.
Phase 2 (meta-improvement) is opt-in for a single-skill run: unless `--meta` is passed, a run
that targets one named skill ends after phase 1 and reports. Collection-wide runs enter phase 2
by default. Either way, phase 2 still pauses for review.
---
## Performance
- Batch similar edits and validations to reduce repeated full-collection scans.
- Prioritize low-scoring or recently changed skills before polishing already-healthy ones.
- Use focused diffs and line-count checks after each batch to avoid late cleanup churn.
---
## Best Practices
- Snapshot evaluation criteria before editing the skills that define the criteria.
- Revert changes that add complexity without improving behavior.
- Keep run history factual and free of unverifiable score inflation.
- Deduct behavioral points only for a named failed quality signal or verified defect. Do not
reserve points merely because a case was simulated or a live runtime was unavailable.
- Composite scores are the minimum of k >= 3 independent fresh-context gradings, not a
single grader. Treat point-estimate moves below the plateau delta (2 points) as judge
variance, not change. Anchor keep/revert decisions on the lower-bound composite and the
structural gate, not on one grader's estimate.
- Leave externally-maintained version, CVE, and EOL pins out of scope. When a
collection has a freshness routine (or equivalent) that owns version currency,
do not edit those pins during a run and do not score them as "unverifiable"
failures; flag only internal contradictions.
- Audit offensive or security skills (privilege escalation, exploit research)
in-loop rather than through web-researching subagents, which can trip platform
safeguards. Keep their scoring and edits in the main session.
- Treat cross-harness review as a data export. Before sending private or sensitive repository
content to another provider, require explicit user authorization for that destination; a
request to run skill-refiner alone is not authorization. Otherwise use the fresh local-reviewer
fallback and record why.
## Workflow
### Phase 0: Setup
1. **Create feature branch**: `skill-refiner/YYYY-MM-DD-HHMMSS` from current HEAD.
Preserve dirty worktrees; branching isolates the run, it does not imply cleanup. If already
on a run branch for this sweep, record it instead of nesting another branch. Do not mix
unrelated dirty files into refiner commits; isolate them with a path-limited stash only
when authorized.
2. **Load run history**: read `.refiner-runs.json` from the repository root, beside
`.refiner-ledger.md` (if it exists). Repository root, not the `skills/` directory: a
second history file in `skills/` splits the log and hides prior baselines.
Use previous run data for: baseline score comparison (detect regressions from external
changes), model/harness change detection (flag if the primary or secondary model changed
since last run - new model = new baseline, not a comparable delta), and skip analysis
(don't re-attempt improvements that were already tried and reverted in a recent run).
Compute the current rubric hash with `scripts/refiner-rubric-hash.sh` and record it. If it
differs from the most recent run's recorded `rubric_hash`, prior scores are not comparable:
start a fresh baseline and do not compute deltas against the old run.
3. **Build skill inventory**: list all skills, exclude phase-2 targets (skill-creator,
skill-refiner) from the improvement pool
4. **Record evaluator identity**: capture actual provider, resolved model, effective effort,
harness and version for primary and reviewer evaluations, with redacted runtime/config
evidence per `references/harness-detection.md`. Record unavailable fields as unknown;
requested flags and skill effort metadata do not prove effective runtime settings.
5. **Probe for secondary harness**: run three-step validation (PATH check, config check,
smoke test) per `references/harness-detection.md`. Announce result.
Before sending a review payload, classify the source as public, private, or sensitive and
verify that the user authorized sharing it with that harness/provider.
6. **If no authorized secondary is available**: **always fall back to self-review.** Spawn a fresh agent on
the current harness with the review prompt template from `references/harness-detection.md`.
Label as "same-model fresh-context review" only when identity is verified; otherwise use
"unknown-model fresh-context review". Review is penalty-only and identical in form at
baseline and every iteration: verified flags deduct `cap * weight` from the composite, with
cap 5 for a verified distinct model and cap 3 for same-model or unknown-model review. A
clean review adds no bonus. Different harnesses alone do not establish model diversity.
Skipping review entirely is not an option - a fresh-context self-review is the minimum bar.
If the harness doesn't support subagents, run the review prompt as a separate CLI
invocation (`claude -p`, `codex exec`, `gemini -p`, etc.).
### Phase 1: Regular Iterations
7. **Iteration 1 - full sweep**: score every skill in the pool using the gate/AI/behavioral
model with penalty-only review from `references/evaluation-criteria.md`
- Structural: run lint-skills.sh + validate-spec.sh
- AI Self-Check: invoke **skill-creator** review mode in at least 3 independent
fresh-context gradings per skill; use the minimum (lower bound), not the mean
- Behavioral: run test prompts from `references/test-cases.md` in at least 3 independent
fresh-context gradings; use the minimum (lower bound). For skills without
pre-written test cases, auto-generate 2-3 test prompts from the skill's "When to use"
section and quality signals from its AI Self-Check. Log a warning that generated tests
are lower quality than hand-written ones. Optionally save generated tests to a
`references/test-cases-local.md` file alongside `references/test-cases.md` so they accumulate across runs.
- Cross-model: skip on first iteration (no diff to review yet; penalty is 0)
8. **Log baseline scores**: record per-skill and aggregate scores
in a score ledger before any edits. The ledger must include structural gate (G),
AI Self-Check (A), behavioral score (B), verified flag count and penalty, reviewer
classification and applied cap, composite score, test source, evaluator identity and
evidence for each evaluation, and timestamp. After this step, if the ledger is
missing, incomplete, or only records lint/spec status, pause and backfill scoring before
applying changes. In headless mode, halt the run and report the missing score data.
9. **Iteration 2+**: enter adaptive focus mode. Honor any explicitly requested minimum iteration
count and score target for the whole run, not only single-skill runs: keep iterating until the
requested rounds are complete and the target is reached across the pool, quality plateaus, or a
circuit breaker fires. A collection-wide requested minimum overrides an early plateau or
threshold termination. For a user-requested single-skill run, treat that skill as the whole
phase-1 pool.
10. **Select targets**: identify skills scoring below the focus threshold
11. **For each targeted skill**, run the improvement cycle:
a. Read current SKILL.md and all reference files
b. Invoke **skill-creator** review mode in at least 3 independent fresh-context
gradings - collect findings and take the minimum
c. Run behavioral tests in at least 3 independent fresh-context gradings; take the
minimum as the component score
d. Propose targeted improvements based on findings (not random changes)
e. Apply changes to SKILL.md (and references if needed)
f. Re-score structural, AI Self-Check, and behavioral components, each as the minimum of
at least 3 fresh-context gradings; keep the change provisional
g. Send the minimum necessary diff to an authorized peer reviewer or the fresh local fallback
h. Process flags per `references/harness-detection.md` verification protocol
i. If secondary flags major issue and primary agrees: revert
j. If secondary flags major issue and primary disagrees: escalate to circuit breaker
k. **Karpathy gate**: compute the lower-bound composite for the change and for the
pre-change version with the same formula. Keep only when the lower-bound composite
strictly improves by at least the plateau delta (2 points) over the previous lower-bound
composite, or when it preserves that composite while reducing complexity or lines with
no behavior change; unverifiable point-estimate moves never keep a change. Otherwise
revert.
12. **Commit iteration**: one commit with all improvements from this iteration
Format: `refactor(skill-refiner): iteration N - skill1(+X), skill2(+Y)`
13. **Log iteration summary**:
```
--- iteration N / max -------------------------------------------
improved: skill1 (72 > 80 | G:pass A:76 B:78 pen:0), skill2 (68 > 73 | G:pass A:70 B:72 pen:0)
gated: skillZ (lint/spec failed - excluded from scoring)
skipped: M skills above threshold
reverted: skill3 (lower bound regressed, rolled back | G:pass A:74 B:69 pen:1.0)
contested: skill4 (secondary flagged major, primary disagreed)
plateau: yes/no (max lower-bound delta: +X)
-----------------------------------------------------------------
```
Also append the same data to the score ledger. Keep/reject decisions must point to
numeric before/after scores, not reviewer impressions or passing lint/spec checks.
14. **Check termination conditions** (a collection run flows into phase 2 on termination;
a single-skill run stops after phase 1 unless `--meta` was passed. Circuit-breaker pauses
wait for user input first):
- Saturated? If every skill is at composite 100 (or >= 99), terminate phase 1 as
"saturated". Do not raise the threshold past its hard cap of 95.
- Plateau detected (max lower-bound delta < plateau threshold)? Terminate phase 1.
- All skills above focus threshold? Bump threshold by 5, capped at 95. If already at 95,
terminate phase 1.
- Iteration cap reached? Terminate phase 1.
- Circuit breaker triggered? Pause for user input.
15. **Repeat** from step 10 until terminated
### Phase 2: Meta-Improvement
16. **Announce**: "Entering phase 2 - meta-improvement. This always requires human review."
Enter phase 2 only for a collection run or when `--meta` was passed; a single-skill run
that did not opt in stops after phase 1 and reports.
17. **Snapshot evaluation criteria**:
- Copy **skill-creator**'s AI Self-Check section to a temp location
- Copy `references/evaluation-criteria.md` to a temp location
- Copy **skill-creator**'s `conventions.md` reference to a temp location
These snapshots are the evaluation baseline for phase 2.
18. **Improve skill-creator**: run the improvement cycle (steps 11a-11k) using the
snapshot as the evaluation criteria, not skill-creator's live version
19. **Improve skill-refiner**: same process, using the snapshot
- Compare every public `skills/*/SKILL.md` directory with the canonical `### <skill-name>`
headings in `references/test-cases.md`. Exclude the format-template heading.
- Promote stable generated or local cases into the canonical catalog for every gap, then
verify there are no missing, duplicate, or orphan headings. This edit is phase-2-only.
20. **Improve lint scripts** (lint-skills.sh, validate-spec.sh):
- Capture baseline: run both scripts, save full output
- Propose improvements
- Apply changes
- Run regression: compare output to baseline
- If false positives or false negatives introduced: revert
- If clean: keep
21. **Commit phase 2**: one commit per target
Format: `refactor(skill-refiner): meta - improve <target> (+N)`
22. **Pause for human review**: display phase 2 changes, wait for approval.
This checkpoint is non-configurable - it fires even in `--mode auto`.
A direct user approval such as "continue" or "proceed" counts as approval to resume.
### Phase 3: Summary
23. **Final report**: write a human-readable report first, then machine-readable run history.
Include branch, pool, config, every changed skill, score before/after, delta, files changed,
verification commands, peer-review flags, reverted changes, private-skill handling, and
skipped checks. If scoring was reconstructed after the fact, label it retroactive and state
which components were not captured during the live loop. Do not output only JSON.
```
=== skill-refiner run complete ===================================
Branch: skill-refiner/YYYY-MM-DD-HHMMSS
Primary: <harness> <version> (<provider>/<resolved model>, effective effort: <level>)
Secondary: <same identity fields> | none (baseline only)
Evidence: <redacted runtime/config references; unknown fields and reasons>
Review: <verified cross-model | same-model | unknown-model>, cap: <5 | 3>
<baseline: no diff, penalty 0>
Pool: N skills (skill-creator, skill-refiner excluded)
Config: iterations=M, threshold=T, mode=MODE, plateau=P
Iterations: N (of max M)
Terminated: plateau / threshold / cap / saturated / user
Score changes:
skill1: 62 > 88 (+26) [G:pass A:84 B:86 pen:0]
skill2: 71 > 85 (+14) [G:pass A:82 B:79 pen:0]
...
skill-creator: 80 > 84 (+4) [G:pass A:82 B:81 pen:0] [meta]
skill-refiner: 78 > 83 (+5) [G:pass A:80 B:79 pen:0] [meta]
Aggregate: avg X.X | min X.X | max X.X
Reverted: X changes across Y iterations
Contested: Z flags escalated to human
=================================================================
```
24. **Write run history**: append this run's metadata to `.refiner-runs.json` at the
repository root, the same file read in Phase 0 step 2. Include `schema: 2` and
`rubric_hash: <value>` from `scripts/refiner-rubric-hash.sh`, plus run_id, branch, date,
primary/secondary provider+resolved model+effective effort+harness+version and redacted
runtime/config evidence per evaluation, reviewer classification and applied cap, config,
pool size, termination reason, peer-review flag counts, before/after per-skill
scores (component breakdown + composite, or clearly labeled estimates if the run used a
targeted manual rubric instead of the full automated sweep), and a changes summary. When
updating an existing history file, append the new object without reserializing the whole
file; do not normalize or rewrite old entries just because a JSON writer changes escaping,
commas, or whitespace. Commit with the phase 3 summary.
25. **Announce branch**: remind user to review and merge when ready
## AI Self-Check
Before committing any skill modification, verify:
- [ ] **Lint passes**: lint-skills.sh exits 0 for the modified skill
- [ ] **Spec valid**: validate-spec.sh exits 0 for the modified skill
- [ ] **Score improved**: a change is kept only when its lower-bound composite (minimum of
k >= 3 fresh-context gradings per component) strictly improves by at least the plateau delta
(2 points), or when it preserves that composite while reducing complexity or lines with no
behavior change
- [ ] **No content regression**: change does not remove critical sections, warnings,
or cross-references without replacement
- [ ] **Simplicity maintained**: change does not add unnecessary complexity for marginal gains,
and no simplification removed a verified-defect fix or critical guard (a flat composite within
judge noise does not license a deletion)
- [ ] **Cross-references intact**: all skill names in bold still resolve to existing skills
- [ ] **Target ~500 lines**: modified SKILL.md stays near 500 lines. Hard max 600
- [ ] **ASCII only**: no non-ASCII characters introduced (except allowed emoji indicators)
- [ ] **Immutability respected**: no phase-1 modification to evaluation criteria,
test cases, lint scripts, skill-creator, or skill-refiner
- [ ] **Current source checked**: dated versions, CLI flags, API names, and support windows are verified against primary docs before repeating them
- [ ] **Hidden state identified**: local config, credentials, caches, contexts, branches, cluster targets, or previous runs are made explicit before acting
- [ ] **Verification is real**: final checks exercise the actual runtime, parser, service, or integration point instead of only linting prose or happy paths
- [ ] **Score discipline kept**: changes are kept only when they improve measured quality or fix a verified defect
- [ ] **Reviewer identity verified**: cap is 5 only for verified distinct models; same or
unknown model identity uses fresh context at cap 3, with runtime/config evidence recorded
- [ ] **Score ledger present**: baseline, iteration, and final component scores exist before reporting completion
- [ ] **Canonical test coverage complete**: phase 2 compares public skill directories with the
canonical test headings and leaves no missing, duplicate, or orphan skill section
- [ ] **Local-only scope respected**: public and private skills are separated before commits or release notes
- [ ] **Review export authorized**: private or sensitive source is sent to another harness/provider
only with explicit user authorization; otherwise the fresh local fallback is used
## Output Contract
See `references/output-contract.md` for the full contract.
- **Skill name:** SKILL-REFINER
- **Deliverable bucket:** `audits`
- **Mode:** conditional. When invoked to **analyze, review, audit, or improve** existing repo content outside the refiner workflow, emit the full contract - monospace inline header, severity-grouped inline summary, linked Markdown deliverable, and concise monospace conclusion - and write the deliverable to `docs/local/audits/skill-refiner/<YYYY-MM-DD>-<slug>.md`. When invoked to **run the refiner workflow** (its primary mode), use the existing Phase 3 "Final report" format described in the workflow; that build-mode output is unchanged by this contract.
- **Severity scale:** `P0 | P1 | P2 | P3 | info` (see shared contract; only used in audit/review mode).
## Related Skills
- **skill-creator** - the evaluation and improvement engine. skill-refiner invokes
skill-creator's review mode (Mode 2) for scoring and its improve mode for
generating changes. skill-creator handles individual skill quality; skill-refiner
handles iteration, prioritization, and orchestration. Primary dependency.
- **full-review** - one-off collection audit across code-review, anti-slop,
security-audit, and update-docs. Use **full-review** for a single pass over
application code; use skill-refiner for iterative improvement of skill files.
- **anti-slop** - code quality patterns. skill-refiner may invoke anti-slop
principles through skill-creator during improvement, but does not call anti-slop
directly. Different domain: anti-slop audits application code, skill-refiner
audits skill files.
## Rules
1. **Immutability in phase 1**: never modify `references/evaluation-criteria.md`,
`references/test-cases.md`, lint-skills.sh, validate-spec.sh, **skill-creator**,
or **skill-refiner** during phase 1. Violation = abort the run.
2. **Karpathy gate**: only lower-bound improvements at or above the noise floor survive.
Keep a change only when its lower-bound composite strictly improves by at least the
plateau delta (2 points) over the previous lower-bound composite, or when it preserves
that composite while reducing complexity or lines with no behavior change. Revert
otherwise; unverifiable point-estimate moves never keep a change.
3. **Verify flags**: never take cross-model flags at face value. Primary reviews
every flag independently. Disagreements on major flags go to human.
4. **Snapshot before meta**: always snapshot evaluation criteria before phase 2.
Evaluate against the snapshot, never the live version being modified.
5. **Phase 2 is opt-in for single-skill runs and always pauses**: a run targeting one named
skill enters phase 2 only with `--meta`; collection runs enter it by default. Either way it
pauses for human review, even in `--mode auto`. Non-configurable.
6. **Contested major flags always pause**: even in `--mode auto`. Non-configurable.
7. **Simplicity criterion**: all else being equal, simpler is better. Deletions that maintain
score are preferred over additions that marginally improve it - but never delete a verified-defect
fix, security warning, or critical guard to satisfy simplicity, and never justify a deletion by a
flat composite when that delta is within judge noise. Simplicity applies only when behavior and
defect coverage are unchanged.
8. **One commit per iteration**: bundle improvements, include score deltas in message.
9. **Branch isolation**: all work on a feature branch. Never modify main directly.
10. **Human-readable report required**: every run ends with a report that names changes,
before/after scores, verification, peer-review flags, skipped checks, and next action.
11. **Read before edit**: always read the full skill before proposing changes.
Never edit from memory or assumption.
12. **No score laundering**: do not call a run scored unless component scores were recorded.
Retroactive scoring is allowed only when clearly labeled.
13. **No unapproved review export**: do not send private or sensitive repository content to a
secondary harness/provider without explicit user authorization for that destination.