copycat

A research workflow that checks newly released Claude Code features against a project's plans and current code.

In plain words
What is it for?
Use it to review Claude Code updates, inspect a project's shipped features and vision, identify gaps, assess implementation difficulty, and suggest roadmap additions.
Why use it?
It shows which features are already available, partly implemented, or missing, so roadmap decisions are based on a comparison.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/vicmaster/coide/copycat
Any agent
npx skills add vicmaster/coide --skill copycat
Clone the repo
git clone --depth 1 https://github.com/vicmaster/coide

Made for: Claude Code, Codex.

Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 527 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00026 $0.00527
Opus 5 $0.00013 $0.00264
Sonnet 5 $0.00005 $0.00105
Haiku 4.5 $0.00003 $0.00053

Measured 2d ago against content hash 11dcce85a928, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

copycat 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 2d 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.

.claude/skills/copycat/SKILL.md · 45 lines

What it actually says

Copycat — Claude Code Feature Scout

Find what's new in Claude Code that coide doesn't have yet, assess feasibility, and update the roadmap.

Instructions

  1. Research what's new in Claude Code

    • Web search for recent Claude Code updates, changelogs, release notes, blog posts
    • Search queries like: "Claude Code new features", "Claude Code changelog", "Claude Code update", "Anthropic Claude Code release"
    • If "$ARGUMENTS" is provided, focus the search on that specific area
    • Look at the official docs: https://docs.anthropic.com/en/docs/claude-code
  2. Read coide's current state

    • Read SHIPPED.md for the archive of features already built
    • Read VISION.md for the unchecked roadmap (## Roadmap section) and the conceptual feature catalog
    • Skim key implementation files if needed to understand current capabilities
  3. Compare and identify gaps

    • List every Claude Code feature found in research
    • For each, mark whether coide: ✅ already has it, 🟡 has it partially, or ❌ doesn't have it
    • Focus on the ❌ and 🟡 items
  4. Assess feasibility for each gap

    • Easy: Can be built with existing architecture, no new dependencies
    • Medium: Requires new dependencies or moderate refactoring
    • Hard: Requires significant architecture changes or new Electron capabilities
    • Briefly explain why (1-2 sentences)
  5. Present findings to the user

    • Show a summary table: Feature | Status | Feasibility | Notes
    • Highlight the most impactful features to add
    • Ask the user which ones they'd like to add to VISION.md
  6. Update VISION.md

    • Append user-approved features as - [ ] items under the ## Roadmap section
    • Use the same format as existing items: - [ ] Feature name — brief description
    • Do NOT remove or modify any existing items
    • Do NOT add anything to SHIPPED.md — that file is only updated when a feature actually ships (via /ship-feature)
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. 2d ago First seen · 45 lines · 26 tokens per session scan A 11dcce85a928

Subscribe to this mod's changes

copycat is a skill published in the GitHub repository vicmaster/coide (10 stars, last pushed 2mo ago), licensed MIT. It adds 26 tokens to every session and 527 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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