cos: Skill for Claude Code

.claude/skills/openwhispr-mcp-setup/SKILL.md

openwhispr-mcp-setup is a skill for Claude Code from philipyaz/cos. It costs 214 tokens per session (4,315 once invoked), scanned B, original, MIT.

A setup guide for connecting OpenWhispr, a desktop app that records voice notes and keeps their transcripts. It connects that local note store to Claude Code and Claude Desktop.

In plain words
What is it for?
Use it when installing OpenWhispr support on a new machine or connecting the app to both Claude clients.
Why use it?
It removes the manual configuration needed to make voice-note transcripts available to the coding agent.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is philipyaz/cos's own configuration. It tells Claude Code how to work on cos 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 cos configures →

Reuse

Borrowing it

Nothing to install: this file belongs to philipyaz/cos. 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/philipyaz/cos/main/.claude/skills/openwhispr-mcp-setup/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/philipyaz/cos

Made for: Claude Code.

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README.md
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Your own site
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Your own site · 80×15
<a href="https://agentmods.dev/skills/philipyaz/cos/openwhispr-mcp-setup"><img src="https://agentmods.dev/badge/skills/philipyaz/cos/openwhispr-mcp-setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 214 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,315 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00214 $0.04315
Opus 5 $0.00107 $0.02158
Sonnet 5 $0.00043 $0.00863
Haiku 4.5 $0.00021 $0.00432

Measured 9d ago against content hash 8e88b4931842, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

openwhispr-mcp-setup scanned grade B with 2 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 9d 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.

Reads MCP configurationmediumAgent snooping

mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.

grep -q '"openwhispr"' "$REPO_ROOT/.mcp.json" && echo ".mcp.json OK"

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -X POST "$OPENWHISPR_BRIDGE_URL/mcp" \
.claude/skills/openwhispr-mcp-setup/SKILL.md · 223 lines

How it starts

The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenWhispr MCP setup (voice-notes add-on — stdio MCP bridge :8002)

Why this exists / architecture

openwhispr is the optional voice add-on. Unlike the core Cos servers (board, calendar, guard, vault), it has an external-app dependency: it does nothing but expose the OpenWhispr desktop app's local transcript store, so it only makes sense on a machine where you actually use OpenWhispr. That's why it lives in its own skill — the same shape as whatsapp-mcp-setup (which integrates an external app + needs pairing). board / calendar / guard / vault stay in mcp-bridge-setup; this skill adds the one optional voice server on top.

It is a single processmcp/openwhispr-server/server.mjs, a Node stdio MCP server — and it registers into Cos the same two ways the core servers do:

  • Claude Code reaches it over HTTP via a supergateway + launchd BRIDGE on :8002 ($OPENWHISPR_BRIDGE_PORT, label com.chiefofstaff.mcp-openwhispr, IN .mcp.json).
  • Claude Cowork Desktop spawns it as a direct stdio command entry in claude_desktop_config.json — identical to how mcp-bridge-setup wires board/calendar/etc.
Claude Code   ──HTTP──> localhost:8002/mcp ──supergateway(launchd)──> node openwhispr-server (stdio)
                                                                          │ reads READ-ONLY (sqlite3 CLI)
                                                                          └──> ~/Library/Application Support/open-whispr/
                                                                               transcriptions.db + audio/*.webm
Cowork Desktop ──spawns stdio directly──────────────────────────────────> node openwhispr-server   (§4)

The server reads the store read-only (via the sqlite3 CLI; WAL lets it read safely alongside a running OpenWhispr — though a clean shutdown can transiently remove the -shm file a read-only open needs, see Gotchas) and owns the watermark (state/watermark.json) that makes the voice ingest loop idempotent — list_transcripts → route → mark_processed never re-emits a routed note. The board-side routing is owned by /second-brain-ingest + the voice recipe; this skill only stands up the plumbing.

Read the full file on GitHub · 223 lines

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. 9d ago First seen · 223 lines · 214 tokens per session scan B 8e88b4931842

Subscribe to this mod's changes

openwhispr-mcp-setup is a skill published in the GitHub repository philipyaz/cos (4 stars, last pushed today), licensed MIT. It adds 214 tokens to every session and 4,315 once invoked, about $0.0011 per session on Opus 5. A static security scan graded it B with 2 findings (reads mcp configuration, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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