A command that attaches a context watcher to the current Claude Code session through tmux, a terminal multiplexer that keeps programs running in managed panes.

Starting managed-mode context monitoring for a session that is running inside tmux.

It can type /compact automatically when the session reaches its configured threshold and report whether a watcher is already attached.

attach — Command by msshives-gif

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 commands/msshives-gif/claude-plugins/attach

Clone the repo

git clone --depth 1 https://github.com/msshives-gif/claude-plugins

Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 427 The whole file, excluding the scripts and references it only reads on demand.

Security scan B 1 finding. 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.

Model	Per session	Once invoked
Fable 5	$0.00012	$0.00427
Opus 5	$0.00006	$0.00214
Sonnet 5	$0.00002	$0.00085
Haiku 4.5	$0.00001	$0.00043

Measured 2d ago against content hash be2790ed2c19, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

attach 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 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.

Reads agent configuration directoriesmediumAgent snooping

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

itself: `find ~/.claude/plugins -maxdepth 8 -type f -name

plugins/compact-manager/commands/attach.md · 34 lines

What it actually says

Attach the compact-manager watcher to the current Claude Code session so /compact gets typed automatically at the configured threshold (managed mode).

Locate the compact-manager CLI. The path in the later steps normally reads as an absolute path (script installs write it in). If it instead still says ${CLAUDE_PLUGIN_ROOT} literally — plugin installs may not substitute command markdown — find the CLI file itself: find ~/.claude/plugins -maxdepth 8 -type f -name compact-manager -path "*/bin/*" 2>/dev/null (this handles versioned cache layouts, where a directory merely NAMED compact-manager has no bin/). If several paths match, use the most recently modified (ls -t).
Check the pane: run echo "$TMUX_PANE" in your shell tool. If it is empty, this session is not running under tmux — managed mode requires tmux. Report that and stop.
Run: "${CLAUDE_PLUGIN_ROOT}/bin/compact-manager" adopt -t "$TMUX_PANE" --attended
Interpret the result:
- Success (prints watcher pid=… run_token=…): confirm with the overview subcommand and report this session's watcher state.
- A lease error (lease_held or similar): a live watcher already holds this session or pane — report that it was already attached, with the overview output.
- Any other error: report it verbatim. Do not retry in a loop.
If the configured mode is not managed (config file ~/.claude/compact-manager.json, env COMPACT_MANAGER_MODE), the hooks will not cooperate with the watcher: tell the user to set {"mode": "managed"} there first.

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.

2d ago First seen · 34 lines · 12 tokens per session scan B be2790ed2c19

Subscribe to this mod's changes

attach is a command published in the GitHub repository msshives-gif/claude-plugins (2 stars, last pushed 5d ago), licensed MIT. It adds 12 tokens to every session and 427 once invoked, about $0.0001 per session on Opus 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.

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attach

Getting it into your agent

What it costs to keep this loaded

Grade B, and why

Reads agent configuration directoriesmediumAgent snooping

What it actually says

What this file has done since we first saw it

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