What is cc-tab-titles CLAUDE.md?

A set of project instructions for cc-tab-titles, a Claude Code add-on that changes terminal tab titles to summaries of the current work.

Use it when developing or testing cc-tab-titles, including its Bash hooks, title handling, and project-specific tests.

It gives the coding agent the project layout, design decisions, development notes, and sandbox rules it needs to work on the project correctly.

How STRML/cc-tab-titles configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to STRML/cc-tab-titles. 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/STRML/cc-tab-titles/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/STRML/cc-tab-titles

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/strml/cc-tab-titles/claude-md/github.svg)](https://agentmods.dev/instructions/strml/cc-tab-titles/claude-md)

Your own site

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

Per session 745 This file is loaded in full into every session.

When invoked 745 The same file — it is already loaded in full.

Security scan A 0 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.

Model	Per session	Once invoked
Fable 5.1	$0.00745	$0.00745
Opus 5.5	$0.00298	$0.00298
Sonnet 5.5	$0.00149	$0.00149
Haiku 4.5	$0.00075	$0.00075

Measured 2mo ago against content hash ad952d8b2cc4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cc-tab-titles CLAUDE.md 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 2mo 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.md · 50 lines

How it starts

The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.

cc-tab-titles

A Claude Code plugin that sets terminal tab titles to AI-generated summaries of what's being worked on.

Project Structure

hooks/
  hooks.json          # Hook definitions (SessionStart, Stop, UserPromptSubmit)
  set-tab-title.sh    # Stop hook: generates summary via claude -p (Haiku), writes OSC title
  session-start.sh    # SessionStart hook: claims tab ownership for new session
  restore-title.sh    # UserPromptSubmit hook: re-applies saved title after Claude resets it
  statusline.sh       # Optional statusLine command to keep title persistent
  lib/
    project-slug.sh   # compute_project_slug(): CamelCase 2-chars-per-word slug
    session-title.sh  # last_custom_title(): reads the user's /rename title from the transcript
tests/
  run-tests.sh        # Runs every test-*.sh
  test-project-slug.sh
  test-session-start.sh
  test-session-title.sh
  lib/assert.sh       # Tiny test helpers

No build system or package manager — pure bash. Run bash tests/run-tests.sh.

Key Architecture Decisions

Non-blocking: set-tab-title.sh spawns a background subshell (disown) to avoid blocking Claude Code
Tab ownership: Uses /tmp/claude-tab-titles/owner-<TAB_KEY> to guard against stale writes landing in a new session's tab
TTY detection: Prefers $CMUX_SURFACE_ID (cmux multiplexer); falls back to stat -f '%Lr' /dev/tty
Title persistence: Saved to /tmp/claude-tab-titles/<session_id>; restored on UserPromptSubmit with 0.5s delay
Haiku model: claude-haiku-4-5-20251001 with --effort low and all hooks/sessions/tools disabled for speed
/rename override: /rename <name> writes {"type":"custom-title","customTitle":...} to the transcript (it fires no hook). The hooks read that, suppress Haiku, and record a <session>.rename marker until the user renames to a different value. Auto-generated "ai-title" entries are ignored — only explicit renames win. Behavior differs by terminal:
- cmux already displays the renamed session natively, so the hooks just clear cc-tab-titles' own override (cmux tab-action --action clear-name) and defer to cmux — they do not set a competing title. session-start.sh does the same when resuming an already-named session, avoiding a project-name flash.
- Other terminals have no native session name, so the rename value is written to the tab title via OSC.

Read the full file on GitHub · 50 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.

2mo ago First seen · 50 lines · 745 tokens per session scan A ad952d8b2cc4

Subscribe to this mod's changes

cc-tab-titles CLAUDE.md is an instructions file published in the GitHub repository STRML/cc-tab-titles (2 stars, last pushed 4mo ago), licensed MIT. It adds 745 tokens to every session, about $0.0030 per session on Opus 5.5. 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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cc-tab-titles: Instructions file for Claude Code