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.
npx agentmods add commands/chrisdbaldwin/masques/idgit clone --depth 1 https://github.com/ChrisDBaldwin/MasquesWhat 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 | $0.00008 | $0.00685 |
| Opus 5 | $0.00004 | $0.00342 |
| Sonnet 5 | $0.00002 | $0.00137 |
| Haiku 4.5 | $0.00001 | $0.00068 |
Grade A, and why
id 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.
How it starts
The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Masque ID Command
Display the current masque identity status.
Instructions
Step 1: Read Session File
Read .claude/masque.session.yaml to check current state.
If file doesn't exist, report: "No masque state found. Use /don <name> to adopt a masque."
Step 2: Check State
Parse the session file as YAML with structure:
active.name- Display name of active masque (null if none active)active.source- Where masque was found:privateorsharedactive.donned_at- When current masque was donnedprevious.name- Name of last worn masqueprevious.source- Source of last worn masqueprevious.doffed_at- When last masque was doffed
If active.name is null (no active masque):
- Report: "No masque active. You are operating as baseline Claude."
- If
previous.nameis set:- Show: "Last worn: [previous.name] (doffed [previous.doffed_at])"
- Suggest: "Use
/listto see available masques,/don <name>to adopt one." - Stop here.
If active.name has a value (masque is active):
- Construct path based on source (lowercase the name for the filename, replace spaces with hyphens):
- If
sourceisprivate:${MASQUES_HOME:-~/.masques}/<lowercase-name>.masque.yaml - If
sourceisshared:${CLAUDE_PLUGIN_ROOT}/personas/<lowercase-name>.masque.yaml - Example: name "Codesmith" + source "shared" →
personas/codesmith.masque.yaml - Example: name "Shy Guy" + source "private" →
~/.masques/shy-guy.masque.yaml
- If
- Read the masque YAML from the constructed path
- If the file does not exist at the constructed path, report a warning: "Session references [name] but the masque file was not found at [path]. It may have been moved or deleted. Use
/don <name>to re-don or/doffto clear."
Step 3: Display Active Masque
Extract details from the masque YAML and display:
Active Masque: [name] v[version] [private]
Donned: [donned_at]
Domain: [attributes.domain]
Tagline: [attributes.tagline]
Philosophy: [attributes.philosophy]
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.
- 2d ago First seen · 72 lines · 8 tokens per session scan A cf8abe089fbc
id is a command published in the GitHub repository ChrisDBaldwin/Masques (14 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 8 tokens to every session and 685 once invoked, about $0.0000 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 2026-08-30.
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