What is backchannel CLAUDE.md?

Repository instructions for Claude Code that explain how to work on the Backchannel meeting-analysis app and record coordination decisions. They cover the codebase, build commands, worktrees, and Sentrux, a tool for checking project structure.

Use them when maintaining Backchannel, running its frontend or backend checks, creating worktrees, troubleshooting builds, or checking whether the project structure still matches its approved design.

They give coding agents shared project context and a consistent way to record decisions, blockers, and changes. This reduces guesswork and prevents agents from losing track of each other’s work.

How talberthoule/backchannel configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to talberthoule/backchannel. 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/talberthoule/backchannel/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/talberthoule/backchannel

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/talberthoule/backchannel/claude-md/github.svg)](https://agentmods.dev/instructions/talberthoule/backchannel/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/talberthoule/backchannel/claude-md"><img src="https://agentmods.dev/badge/instructions/talberthoule/backchannel/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/talberthoule/backchannel/claude-md"><img src="https://agentmods.dev/badge/instructions/talberthoule/backchannel/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 6,684 This file is loaded in full into every session.

When invoked 6,684 The same file — it is already loaded in full.

Security scan B 1 finding. 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.

Model	Per session	Once invoked
Fable 5.1	$0.06684	$0.06684
Opus 5.5	$0.02674	$0.02674
Sonnet 5.5	$0.01337	$0.01337
Haiku 4.5	$0.00668	$0.00668

Measured 1mo ago against content hash 49e1614d8e8e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

backchannel CLAUDE.md scanned grade B with 1 finding 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

Sentrux is installed at `C:/Users/thoule/.local/bin/sentrux.exe` and configured as a Codex MCP server in `C:/Users/thoule/.codex/config.toml`.

CLAUDE.md · 337 lines

How it starts

The opening of the file, as written. The whole thing — 337 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with this repository.

Coordination Record

The durable record for this repository is Linear: team Alpha, project Backchannel, issue IDs ALP-NNN. Findings, verdicts, decisions and their rationale, blockers, and declined alternatives go there; Herdr agent send carries only the issue ID and one line of what changed. Because the Linear MCP server writes with a single shared credential, every agent's issue and comment is authored by the human who owns the token, so record Requested by / Performed by / Date / Scope in the body. Branches are agent/alp-NNN-slug; design docs live in docs/superpowers/specs/ and plans in docs/superpowers/plans/. See the Routing Substance and Pointers section of the coordinating-herdr-agents skill.

Git worktrees live outside this checkout, at C:/work/backchannel/<lane>: git worktree add C:/work/backchannel/<lane> -b agent/alp-NNN-slug master. The main checkout is C:/code/backchannel, outside OneDrive. The earlier checkout sat in a OneDrive-synced folder, and sync repeatedly stripped the .git file out of worktrees created under .worktrees/, orphaning them from git worktree list while leaving the directories behind (ALP-139). Keep checkouts and worktrees out of synced folders, and do not recreate .worktrees/. Note also that the Docker Compose stack binds the main checkout, so a worktree suits docs, review, and analysis rather than work needing integration testing.

Current Codebase Snapshot

Backchannel (formerly Call Helper) is a real-time meeting analysis app. A React frontend captures microphone audio (and optionally tab/system audio) as PCM16 16 kHz mono and streams it over WebSocket with a 1-byte track prefix. The FastAPI backend writes speaker-attributed transcript entries, records per-segment call audio to disk, runs provider-routed analysis agents (Gemini or OpenAI) over recent transcript text, and stores insights in PostgreSQL.

Read the full file on GitHub · 337 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.

1mo ago Changed · +274 tokens per session 49e1614d8e8e
2mo ago Changed · -8 lines · -147 tokens per session 0e7ba186edff
2mo ago Changed · +13 lines · +758 tokens per session 8b06fc5c6cad
2mo ago First seen · 332 lines · 5,799 tokens per session scan B b2479a7f8d96

Subscribe to this mod's changes

backchannel CLAUDE.md is an instructions file published in the GitHub repository talberthoule/backchannel (11 stars, last pushed 1mo ago), licensed MIT. It adds 6,684 tokens to every session, about $0.0267 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

ai-agents fastapi gemini meeting-assistant meeting-notes openai

backchannel CLAUDE.md next to 6 instructions from other repositories
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backchannel: Instructions file for Claude Code