doncheli-drift skill

by doncheli·doncheli/don-cheli-sdd·57 stars·Apache-2.0

Detect and reconcile divergence between specs and implementation. Activate when user mentions "drift", "sync", "spec divergence", "out of sync", "spec doesn't match", "implementation differs".

A100/100content scan

Is the doncheli-drift skill safe?

Clean: nothing in its files matched our rules. We read 1 file in the folder on 2026-09-28.

No findings.

Install the doncheli-drift skill

A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description.

git clone --depth 1 https://github.com/doncheli/don-cheli-sdd.git /tmp/don-cheli-sdd
mkdir -p ~/.claude/skills
cp -r /tmp/don-cheli-sdd/.agent/skills/doncheli-drift ~/.claude/skills/doncheli-drift

available in every project

In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub

The instructions your agent would load

SKILL.md as published, without the frontmatter. Read it on GitHub

Don Cheli: Spec Drift Detector

Instructions

Read the current spec files in .dc/specs/ and the relevant source code
Compare spec scenarios (Gherkin / acceptance criteria) against the actual implementation
Identify three categories of drift:

Ghost: code exists but no spec covers it
Phantom: spec exists but no code implements it
Mutant: code and spec exist but behavior diverges

For each drift finding, report: file path, spec reference, severity (critical / warning / info)
Propose a reconciliation: either update the spec or flag the code for correction
Never auto-modify code — output a reconciliation plan for human approval
Save a drift report to .dc/drift-report-.md if findings exceed 3 items
If zero drift is found, confirm with a brief "No drift detected — spec and code are aligned"

Output Format

## Drift Report — <date>

### Ghost (code without spec)
- src/payments/refund.ts:42 — no spec covers the refund edge case

### Phantom (spec without code)
- specs/checkout.feature:Scenario 3 — "Apply coupon on mobile" — not implemented

### Mutant (behavior mismatch)
- specs/auth.feature:Scenario 1 expects 401 on expired token; code returns 403

### Reconciliation Plan
1. [Phantom] Implement "Apply coupon on mobile" or mark as backlog in .dc/backlog.md
2. [Mutant] Fix auth.ts to return 401 — spec is correct per RFC 7235
3. [Ghost] Add spec for refund edge case before next release

Do not use this skill when

The user only wants to run tests (use doncheli-tea instead)
The spec has not been written yet (use dc:especificar first)

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