Borrowing it
Nothing to install: this file belongs to natesilva/mcp-certificate-monitor. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/natesilva/mcp-certificate-monitor/main/.claude/skills/openspec-apply-change/SKILL.mdgit clone --depth 1 https://github.com/natesilva/mcp-certificate-monitorWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/natesilva/mcp-certificate-monitor/openspec-apply-change)<a href="https://agentmods.dev/skills/natesilva/mcp-certificate-monitor/openspec-apply-change"><img src="https://agentmods.dev/badge/skills/natesilva/mcp-certificate-monitor/openspec-apply-change/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/natesilva/mcp-certificate-monitor/openspec-apply-change"><img src="https://agentmods.dev/badge/skills/natesilva/mcp-certificate-monitor/openspec-apply-change.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00031 | $0.01205 |
| Opus 5 | $0.00015 | $0.00602 |
| Sonnet 5 | $0.00006 | $0.00241 |
| Haiku 4.5 | $0.00003 | $0.00120 |
Grade A, and why
openspec-apply-change scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to openspec-apply-change — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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 --jsonto 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>" --jsonParse the JSON to understand:
schemaName: The workflow being used (e.g., "spec-driven")planningHome,changeRoot, andactionContext: 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>" --jsonThis 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
Workspace guard: If status JSON reports
actionContext.mode: "workspace-planning"andallowedEditRootsis empty, explain that full workspace apply is not supported in this slice. Treat linked repos and folders as read-only context, ask the user to select an affected area through an explicit implementation workflow, and STOP before editing files. -
Read context files
Read every file path listed under
contextFilesfrom 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
-
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! Ready to archive this change.
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?
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 160 lines · 31 tokens per session scan A da3d97f3ea48
openspec-apply-change is a skill published in the GitHub repository natesilva/mcp-certificate-monitor (0 stars, last pushed 2mo ago), licensed MIT. It adds 31 tokens to every session and 1,205 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to openspec-apply-change, differing in 0 lines, and is treated as a copy.
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