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Openspec Apply Change · chorus-aidlc | DecimalAI

codingby chorus-aidlc

Openspec Apply Change

chorus-aidlc/openspec-apply-change

Source chorus-aidlc/chorus ↗License AGPL-3.0

Implement tasks from an OpenSpec change.

NewMaintained

Automatic

Coding pack

Last verified 8/16/2026

What it changes

Passed 7 of 14 test cases with the skill, and 7 of 14 without it.

Without skill50%

With skill50%

Checks it passed that the model alone missed

Asks the user for clarification regarding the session parameters.
Runs `openspec status --change "doc-site-update" --json` to inspect schema metadata.
Reads every context file specified in the `contextFiles` output before making code changes.

3 fixed8 passed either way9 still failing2 broke

Pass-rate lift: 0 pp
Tokens: +13%
Agent turns: 0%
Response time: -63%

Model gemini-3.6-flashMeasured 8/16/2026v111 of 22 cases passed with skill · 14 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/chorus-aidlc-openspec-apply-change/SKILL.md https://app.decimal.ai/s/chorus-aidlc-openspec-apply-change/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add chorus-aidlc-openspec-apply-change, 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/chorus-aidlc-openspec-apply-change/ and pins it in .decimal/skills.lock

decimalai skills add chorus-aidlc-openspec-apply-change

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

curl -fsSL --create-dirs -o .claude/skills/chorus-aidlc-openspec-apply-change/SKILL.md https://app.decimal.ai/s/chorus-aidlc-openspec-apply-change/SKILL.md

Raw file: /s/chorus-aidlc-openspec-apply-change/SKILL.md ↗ · machine-readable summary at /s/chorus-aidlc-openspec-apply-change.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 3 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 3

Prompt

We are starting work on change 'doc-site-update'. Which command should be used to inspect the `schemaName` and identify which artifact contains the tasks list?

What was checked, without and with the skill
Checked	Without skill	With skill
Runs `openspec status --change "doc-site-update" --json` to inspect schema metadata.	Missed	Passed

case-12 · 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.md145 linessingle file

Implement tasks from an OpenSpec change.

Input: Optionally specify a change name. If omitted, check if it can be inferred from conversation context. If vague or ambiguous you MUST prompt for available changes.

Steps

Select the change

If a name is provided, use it. Otherwise:
- Infer from conversation context if the user mentioned a change
- Auto-select if only one active change exists
- If ambiguous, run openspec list --json to get available changes and use the AskUserQuestion tool to let the user select
Always announce: "Using change: " and how to override (e.g., /opsx:apply <other>).
Check status to understand the schema
```
openspec status --change "<name>" --json
```
Parse the JSON to understand:
- schemaName: The workflow being used (e.g., "spec-driven")
- Which artifact contains the tasks (typically "tasks" for spec-driven, check status for others)
Get apply instructions
```
openspec instructions apply --change "<name>" --json
```
This returns:
- contextFiles: artifact ID -> array of concrete file paths (varies by schema - could be proposal/specs/design/tasks or spec/tests/implementation/docs)
- Progress (total, complete, remaining)
- Task list with status
- Dynamic instruction based on current state
Handle states:
- If state: "blocked" (missing artifacts): show message, suggest using openspec-continue-change
- If state: "all_done": congratulate, suggest archive
- Otherwise: proceed to implementation

Track record

Benchmark

7 / 14

test cases passed, vs 7 / 14 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

chorus-aidlc / chorus

.claude/skills/openspec-apply-change/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

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