Registry indexed

openspec-apply-change

Implement tasks from an OpenSpec change. Use when the user wants to start implementing, continue implementation, or work through tasks.

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Price unconfirmed★ 1,265 GitHub starsRegistry updated · Oct 12, 2026agent-skill

Overview

Implement tasks from an OpenSpec change. Use when the user wants to start implementing, continue implementation, or work through tasks.

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Source documentation, not instructions for this website. Review permissions before running any commands.

Implement tasks from an OpenSpec change.

Store selection: If the user names a store (a store is a standalone OpenSpec repo registered on this machine) or the work lives in one, run openspec store list --json to discover registered store ids, then pass --store <id> on the commands that read or write specs and changes (new change, status, instructions, list, show, validate, archive, doctor, context, view). Once selected, treat --store <id> as sticky for the rest of the workflow. Every unscoped example of those commands below is shorthand: before running it, append the flag. For example, run openspec status --change "<name>" --json --store "<id>", not the unscoped form shown below. Other commands do not take the flag. Hints printed by commands already carry the flag; keep it on follow-ups. Without a store, commands act on the nearest local openspec/ root.

Input: Optionally specify a change name (e.g., $openspec-apply-change (Codex) or /openspec-apply-change (other agents) add-auth). 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 ask the user to select one
Always announce: "Using change: " and how to override (e.g., $openspec-apply-change (Codex) or /openspec-apply-change (other agents) <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")
- planningHome, changeRoot, and actionContext: planning scope and edit constraints
- 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
- Optional context: current required project instruction input from the selected root
- Optional operationGuidance: current advisory guidance for apply
Handle states:
- If state: "blocked" (missing artifacts): show message, suggest using $openspec-continue-change (Codex) or /openspec-continue-change (other agents) (if it is not installed, run openspec status --change "<name>" --json to see the next artifact and openspec instructions <artifact-id> --change "<name>" --json for how to create it)
- If state: "all_done": congratulate, suggest archive
- Otherwise: proceed to implementation
Treat context as a required prompt-level input. Read and consider it, and apply relevant project facts, conventions, and constraints while implementing. Treat operationGuidance as optional additive advice. Read and consider every entry, and follow entries that are applicable and compatible with the built-in workflow.

Keep both fields separate from CLI-returned state, missing artifacts, tasks, progress, contextFiles, and the built-in instruction. They are not evidence of task completion, do not replace the built-in instruction, and do not permit bypassing a blocked state. If context conflicts with the built-in instruction, an explicit user choice, or a CLI-controlled value, report the conflict and preserve the controlling value. If guidance is inapplicable or conflicts with those controlling inputs, do not follow it and explain why. These are prompt-level behavior contracts, not enforceable checks.
Read context files

Read every file path listed under contextFiles from the apply instructions output. The files depend on the schema being used:
- spec-driven: proposal, specs, design, tasks
- Other schemas: follow the contextFiles from CLI output
Do not copy context or operationGuidance verbatim into implementation files or planning artifacts unless the user separately asks for that content.
Show current progress

Display:
- Schema being used
- Progress: "N/M tasks complete"
- Remaining tasks overview
- Dynamic instruction from CLI
Implement tasks (loop until done or blocked)

For each pending task:
- Show which task is being worked on
- Make the code changes required
- Keep changes minimal and focused
- Mark task complete in the tasks file: - [ ] → - [x]
- Continue to next task
Pause if:
- Task is unclear → ask for clarification
- Implementation reveals a design issue → suggest updating artifacts
- Error or blocker encountered → report and wait for guidance
- User interrupts
On completion or pause, show status

Display:
- Tasks completed this session
- Overall progress: "N/M tasks complete"
- If all done: suggest archive
- If paused: explain why and wait for guidance

Output During Implementation

## Implementing: <change-name> (schema: <schema-name>)

Working on task 3/7: <task description>
[...implementation happening...]
✓ Task complete

Working on task 4/7: <task description>
[...implementation happening...]
✓ Task complete

Output On Completion

## Implementation Complete

**Change:** <change-name>
**Schema:** <schema-name>
**Progress:** 7/7 tasks complete ✓

### Completed This Session
- [x] Task 1
- [x] Task 2
...

All tasks complete! You can archive this change with `$openspec-archive-change (Codex) or /openspec-archive-change (other agents)`.

Output On Pause (Issue Encountered)

## Implementation Paused

**Change:** <change-name>
**Schema:** <schema-name>
**Progress:** 4/7 tasks complete

### Issue Encountered
<description of the issue>

**Options:**
1. <option 1>
2. <option 2>
3. Other approach

What would you like to do?

Guardrails

Keep going through tasks until done or blocked
Always read context files before starting (from the apply instructions output)
If task is ambiguous, pause and ask before implementing
If implementation reveals issues, pause and suggest artifact updates
Keep code changes minimal and scoped to each task
Update task checkbox immediately after completing each task
Pause on errors, blockers, or unclear requirements - don't guess
Use contextFiles from CLI output, don't assume specific file names
Do not use context or operation guidance as proof that a task is complete
Apply relevant project context; report conflicts with controlling workflow inputs
Consider every guidance entry; explain any inapplicable or conflicting advice
Do not copy runtime context or operation guidance into implementation files or planning artifacts
Preserve CLI-controlled blocked/ready/all-done behavior and completion criteria

Fluid Workflow Integration

This skill supports the "actions on a change" model:

Can be invoked anytime: Before all artifacts are done (if tasks exist), after partial implementation, interleaved with other actions
Allows artifact updates: If implementation reveals design issues, suggest updating artifacts - not phase-locked, work fluidly

View source ↗

File metadata

name: openspec-apply-change
description: Implement tasks from an OpenSpec change. Use when the user wants to start implementing, continue implementation, or work through tasks.
allowed-tools: Bash(openspec:*)
license: MIT
compatibility: Requires openspec CLI.
metadata:
  author: openspec
  version: "1.0"
  generatedBy: "1.8.0"

View original text

---
name: openspec-apply-change
description: Implement tasks from an OpenSpec change. Use when the user wants to start implementing, continue implementation, or work through tasks.
allowed-tools: Bash(openspec:*)
license: MIT
compatibility: Requires openspec CLI.
metadata:
author: openspec
version: "1.0"
generatedBy: "1.8.0"
---

Implement tasks from an OpenSpec change.

**Store selection:** If the user names a store (a store is a standalone OpenSpec repo registered on this machine) or the work lives in one, run `openspec store list --json` to discover registered store ids, then pass `--store <id>` on the commands that read or write specs and changes (`new change`, `status`, `instructions`, `list`, `show`, `validate`, `archive`, `doctor`, `context`, `view`). Once selected, treat `--store <id>` as sticky for the rest of the workflow. Every unscoped example of those commands below is shorthand: before running it, append the flag. For example, run `openspec status --change "<name>" --json --store "<id>"`, not the unscoped form shown below. Other commands do not take the flag. Hints printed by commands already carry the flag; keep it on follow-ups. Without a store, commands act on the nearest local `openspec/` root.

**Input**: Optionally specify a change name (e.g., `$openspec-apply-change (Codex) or /openspec-apply-change (other agents) add-auth`). If omitted, check if it can be inferred from conversation context. If vague or ambiguous you MUST prompt for available changes.

**Steps**

1. **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 ask the user to select one

Always announce: "Using change: <name>" and how to override (e.g., `$openspec-apply-change (Codex) or /openspec-apply-change (other agents) <other>`).

2. **Check status to understand the schema**
```bash
openspec status --change "<name>" --json
```
Parse the JSON to understand:
- `schemaName`: The workflow being used (e.g., "spec-driven")
- `planningHome`, `changeRoot`, and `actionContext`: planning scope and edit constraints
- Which artifact contains the tasks (typically "tasks" for spec-driven, check status for others)

3. **Get apply instructions**

```bash
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
- Optional `context`: current required project instruction input from the selected root
- Optional `operationGuidance`: current advisory guidance for apply

**Handle states:**
- If `state: "blocked"` (missing artifacts): show message, suggest using `$openspec-continue-change (Codex) or /openspec-continue-change (other agents)` (if it is not installed, run `openspec status --change "<name>" --json` to see the next artifact and `openspec instructions <artifact-id> --change "<name>" --json` for how to create it)
- If `state: "all_done"`: congratulate, suggest archive
- Otherwise: proceed to implementation

Treat `context` as a required prompt-level input. Read and consider it, and
apply relevant project facts, conventions, and constraints while implementing.
Treat `operationGuidance` as optional additive advice. Read and consider every
entry, and follow entries that are applicable and compatible with the built-in
workflow.

Keep both fields separate from CLI-returned state, missing artifacts, tasks,
progress, `contextFiles`, and the built-in `instruction`. They are not
evidence of task completion, do not replace the built-in instruction, and do
not permit bypassing a blocked state. If context conflicts with the built-in
instruction, an explicit user choice, or a CLI-controlled value, report the
conflict and preserve the controlling value. If guidance is inapplicable or
conflicts with those controlling inputs, do not follow it and explain why.
These are prompt-level behavior contracts, not enforceable checks.

4. **Read context files**

Read every file path listed under `contextFiles` from the apply instructions output.
The files depend on the schema being used:
- **spec-driven**: proposal, specs, design, tasks
- Other schemas: follow the contextFiles from CLI output

Do not copy `context` or `operationGuidance` verbatim into implementation
files or planning artifacts unless the user separately asks for that content.

5. **Show current progress**

Display:
- Schema being used
- Progress: "N/M tasks complete"
- Remaining tasks overview
- Dynamic instruction from CLI

6. **Implement tasks (loop until done or blocked)**

For each pending task:
- Show which task is being worked on
- Make the code changes required
- Keep changes minimal and focused
- Mark task complete in the tasks file: `- [ ]` → `- [x]`
- Continue to next task

**Pause if:**
- Task is unclear → ask for clarification
- Implementation reveals a design issue → suggest updating artifacts
- Error or blocker encountered → report and wait for guidance
- User interrupts

7. **On completion or pause, show status**

Display:
- Tasks completed this session
- Overall progress: "N/M tasks complete"
- If all done: suggest archive
- If paused: explain why and wait for guidance

**Output During Implementation**

```
## Implementing: <change-name> (schema: <schema-name>)

Working on task 3/7: <task description>
[...implementation happening...]
✓ Task complete

Working on task 4/7: <task description>
[...implementation happening...]
✓ Task complete
```

**Output On Completion**

```
## Implementation Complete

**Change:** <change-name>
**Schema:** <schema-name>
**Progress:** 7/7 tasks complete ✓

### Completed This Session
- [x] Task 1
- [x] Task 2
...

All tasks complete! You can archive this change with `$openspec-archive-change (Codex) or /openspec-archive-change (other agents)`.
```

**Output On Pause (Issue Encountered)**

```
## Implementation Paused

**Change:** <change-name>
**Schema:** <schema-name>
**Progress:** 4/7 tasks complete

### Issue Encountered
<description of the issue>

**Options:**
1. <option 1>
2. <option 2>
3. Other approach

What would you like to do?
```

**Guardrails**
- Keep going through tasks until done or blocked
- Always read context files before starting (from the apply instructions output)
- If task is ambiguous, pause and ask before implementing
- If implementation reveals issues, pause and suggest artifact updates
- Keep code changes minimal and scoped to each task
- Update task checkbox immediately after completing each task
- Pause on errors, blockers, or unclear requirements - don't guess
- Use contextFiles from CLI output, don't assume specific file names
- Do not use context or operation guidance as proof that a task is complete
- Apply relevant project context; report conflicts with controlling workflow inputs
- Consider every guidance entry; explain any inapplicable or conflicting advice
- Do not copy runtime context or operation guidance into implementation files or planning artifacts
- Preserve CLI-controlled blocked/ready/all-done behavior and completion criteria

**Fluid Workflow Integration**

This skill supports the "actions on a change" model:

- **Can be invoked anytime**: Before all artifacts are done (if tasks exist), after partial implementation, interleaved with other actions
- **Allows artifact updates**: If implementation reveals design issues, suggest updating artifacts - not phase-locked, work fluidly

Review the source

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License: MIT
Price unconfirmed: We have not confirmed a price for this skill. Existing source and install links remain available.

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Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

License: MIT

Dependency or permission surface needs review
Permission surface may require sandboxing
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Open full audit

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Start with one small task

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3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.

Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.

Source & usage notes

IndexedStatic Checked

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

Source repository: MemeMeow-Studio/MemeMeow
License: MIT
Version: 1.0
Last GitHub push: Oct 12, 2026
Registry updated: Oct 12, 2026
Instruction path: .agents/skills/openspec-apply-change/SKILL.md @ 5935e97d9398

Version reported in registry metadata; check source releases before relying on it.

Quality

73/100

Strong

Trust

68/100

Sandbox only

Audit

80/100

Needs review

Open full audit View eval report

Dependency or permission surface needs review
Permission surface may require sandboxing
AI review approval is missing
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution
Review status: AI review approval is missing

Verified installs: —
Outcomes: —

Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.

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More details

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    "auto_install_policy": "block",
    "auto_install_allowed": false,
    "human_review_required": true,
    "blocked": true,
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
  },
  "quality": {
    "score": 73,
    "label": "Strong"
  },
  "supply": {
    "track": "Data, BI, and analytics",
    "scenario": "Data",
    "maintenance": "6d since push",
    "risk": "Needs review"
  },
  "alternative_skills": [
    {
      "slug": "fission-ai-release-openspec",
      "name": "release-openspec",
      "url": "https://www.openagentskill.com/skills/fission-ai-release-openspec",
      "stars": 71049,
      "install_command": "npx skills add Fission-AI/OpenSpec --skill release-openspec",
      "trust_score": 82,
      "audit_score": 86
    }
  ],
  "do_not_use_when": [
    "teams that need a vendor-supported SLA",
    "high-compliance environments without internal security review",
    "No OpenAgentSkill engagement data yet",
    "High-risk permission hints: Shell or command execution, Secrets or environment access",
    "Dependency or permission surface needs review",
    "Permission surface may require sandboxing",
    "AI review approval is missing",
    "Quality score needs review"
  ],
  "agent_contract": {
    "task_input": "Use openspec-apply-change in an agent workflow",
    "recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
    "install_policy": "block",
    "minimum_review_before_use": [
      "Trust: 76/100 Strong shortlist",
      "Audit: 80/100 Needs review",
      "Safety: 32/100 Avoid automatic install",
      "Review repository, license, install command, and permission surface before production use."
    ],
    "expected_agent_output": {
      "selected_skill": "mememeow-studio-openspec-apply-change (openspec-apply-change)",
      "install_command": "npx skills add MemeMeow-Studio/MemeMeow --skill openspec-apply-change",
      "risk_summary": "Needs review; Blocked for auto-install; Review before production",
      "verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
    }
  },
  "outcome_feedback": {
    "endpoint": "https://www.openagentskill.com/api/agent/outcome",
    "method": "POST",
    "requires_resolve_event_id": true,
    "event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
    "expected_outcomes": [
      "success",
      "failed",
      "not_relevant",
      "blocked_by_risk",
      "setup_required"
    ],
    "payload_template": {
      "event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
      "skill_slug": "mememeow-studio-openspec-apply-change",
      "task": "Use openspec-apply-change in an agent workflow",
      "agent": "codex",
      "outcome": "success",
      "install_used": true,
      "risk_blocked": false,
      "setup_required": false,
      "task_success": true,
      "output_quality": 4,
      "error_type": null,
      "human_review_required": false,
      "workspace": "sandbox",
      "time_to_useful_ms": 120000,
      "notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
    }
  },
  "endpoints": {
    "web": "https://www.openagentskill.com/skills/mememeow-studio-openspec-apply-change",
    "api": "https://www.openagentskill.com/api/agent/skills/mememeow-studio-openspec-apply-change",
    "audit": "https://www.openagentskill.com/skills/mememeow-studio-openspec-apply-change/audit",
    "eval": "https://www.openagentskill.com/api/agent/evals?slug=mememeow-studio-openspec-apply-change&task=Use%20openspec-apply-change%20in%20an%20agent%20workflow&max_risk=medium",
    "resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20openspec-apply-change%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
    "receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20openspec-apply-change%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
    "install": "https://www.openagentskill.com/api/skills/mememeow-studio-openspec-apply-change/install",
    "manifest": "https://www.openagentskill.com/api/registry/manifest/mememeow-studio-openspec-apply-change"
  }
}

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Creator: openspec
Source: MemeMeow-Studio/MemeMeow
Indexed by: OpenAgentSkill community index

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