web-widgets: Skill for Claude Code

.agents/skills/openspec-archive-change/SKILL.md

openspec-archive-change is a skill for Claude Code, Codex from mendix/web-widgets. It costs 31 tokens per session (952 once invoked), scanned A, a copy of openspec-archive-change, Apache-2.0.

A workflow step for moving a completed change into an archive in the experimental OpenSpec process.

In plain words
What is it for?
Use it to list available changes, inspect their completion status, and archive a selected completed change.
Why use it?
It helps close out finished work while checking whether required documents and tasks are complete. It also warns before archiving unfinished work.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: names the AskUserQuestion tool; installed under .agents/ (shared by several agents).

This is mendix/web-widgets's own configuration. It tells Claude Code and Codex how to work on web-widgets itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything web-widgets configures →

Reuse

Borrowing it

Nothing to install: this file belongs to mendix/web-widgets. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/mendix/web-widgets/main/.agents/skills/openspec-archive-change/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/mendix/web-widgets

Made for: Claude Code, Codex.

Wrote this? Show the measurements

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README.md
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Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 952 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 88% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00031 $0.00952
Opus 5.5 $0.00012 $0.00381
Sonnet 5.5 $0.00006 $0.00190
Haiku 4.5 $0.00003 $0.00095

Measured 1mo ago against content hash a186490679b2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

openspec-archive-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 1mo 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.

Origin

This is a copy

88% identical to openspec-archive-change — 103 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.

.agents/skills/openspec-archive-change/SKILL.md · 117 lines

What it actually says

Archive a completed change in the experimental workflow.

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

  1. If no change name provided, prompt for selection

    Run openspec list --json to get available changes. Use the AskUserQuestion tool to let the user select.

    Show only active changes (not already archived). Include the schema used for each change if available.

    IMPORTANT: Do NOT guess or auto-select a change. Always let the user choose.

  2. Check artifact completion status

    Run openspec status --change "<name>" --json to check artifact completion.

    Parse the JSON to understand:

    • schemaName: The workflow being used
    • artifacts: List of artifacts with their status (done or other)

    If any artifacts are not done:

    • Display warning listing incomplete artifacts
    • Use AskUserQuestion tool to confirm user wants to proceed
    • Proceed if user confirms
  3. Check task completion status

    Read the tasks file (typically tasks.md) to check for incomplete tasks.

    Count tasks marked with - [ ] (incomplete) vs - [x] (complete).

    If incomplete tasks found:

    • Display warning showing count of incomplete tasks
    • Use AskUserQuestion tool to confirm user wants to proceed
    • Proceed if user confirms

    If no tasks file exists: Proceed without task-related warning.

  4. Assess delta spec sync state

    Check for delta specs at openspec/changes/<name>/specs/. If none exist, proceed without sync prompt.

    If delta specs exist:

    • Compare each delta spec with its corresponding main spec at openspec/specs/<capability>/spec.md
    • Determine what changes would be applied (adds, modifications, removals, renames)
    • Show a combined summary before prompting

    Prompt options:

    • If changes needed: "Sync now (recommended)", "Archive without syncing"
    • If already synced: "Archive now", "Sync anyway", "Cancel"

    If user chooses sync, use Task tool (subagent_type: "general-purpose", prompt: "Use Skill tool to invoke openspec-sync-specs for change ''. Delta spec analysis: "). Proceed to archive regardless of choice.

  5. Perform the archive

    Create the archive directory if it doesn't exist:

    mkdir -p openspec/changes/archive
    

    Generate target name using current date: YYYY-MM-DD-<change-name>

    Check if target already exists:

    • If yes: Fail with error, suggest renaming existing archive or using different date
    • If no: Move the change directory to archive
    mv openspec/changes/<name> openspec/changes/archive/YYYY-MM-DD-<name>
    
  6. Display summary

    Show archive completion summary including:

    • Change name
    • Schema that was used
    • Archive location
    • Whether specs were synced (if applicable)
    • Note about any warnings (incomplete artifacts/tasks)

Output On Success

## Archive Complete

**Change:** <change-name>
**Schema:** <schema-name>
**Archived to:** openspec/changes/archive/YYYY-MM-DD-<name>/
**Specs:** ✓ Synced to main specs (or "No delta specs" or "Sync skipped")

All artifacts complete. All tasks complete.

Guardrails

  • Always prompt for change selection if not provided
  • Use artifact graph (openspec status --json) for completion checking
  • Don't block archive on warnings - just inform and confirm
  • Preserve .openspec.yaml when moving to archive (it moves with the directory)
  • Show clear summary of what happened
  • If sync is requested, use openspec-sync-specs approach (agent-driven)
  • If delta specs exist, always run the sync assessment and show the combined summary before prompting
Changes

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.

  1. 1mo ago First seen · 117 lines · 31 tokens per session scan A a186490679b2

Subscribe to this mod's changes

openspec-archive-change is a skill published in the GitHub repository mendix/web-widgets (40 stars, last pushed today), licensed Apache-2.0. It adds 31 tokens to every session and 952 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 88% identical to openspec-archive-change, differing in 103 lines, and is treated as a copy.

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