What is spawn-ledger?
spawn-ledger is a Claude Code mod by Tekkiiiii that spawn log (spawn_start/launched/end + cost, native agentId lineage), artifact check and in-session RESPAWN_REQUEST pickup for every subagent, background included. It is listed under Cost & usage and has 6 GitHub stars.
| Type | Claude code mod |
|---|---|
| Author | Tekkiiiii |
| Repository | Tekkiiiii/the-agency |
| Popularity | 6 GitHub stars |
| Category | Cost & usage |
| Security | Review before installing (72/100) |
| Rank | #675 of 5,272 Claude Code mods; #128 in Cost & usage |
| Last commit | 2026-10-15 |
| Hooks | 5 events |
| Sees | classic hooks, every tool call, subagent spawns |
| Draws on | nothing |
Is spawn-ledger safe to install?
spawn-ledger scores 72/100 on the MCPMods security check: Review before installing. Things to review: starts processes outside the sandbox; reads environment variables. It passed 5 of 8 checks.
Mod footprints come from claude plugin validate, which lists every event a mod hooks and every API call it makes without running it.
| Check | Result |
|---|---|
| No network access | Pass |
| Starts processes outside the sandbox | Review |
| Writes no files or config | Pass |
| Reads environment variables | Review |
| Only sees the events it hooks | Pass |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| No license detected | Note |
API calls in its code
| Call | What it means |
|---|---|
$.agent.list | |
$.env.get | reads env vars |
$.fs.read | reads files |
$.process.run | runs processes |
$.session.append | |
$.state.get | |
$.state.set | |
$.ui.log | draws interface |
$.ui.toast | draws interface |
How do I install spawn-ledger?
- Check your Claude Code version. Mods need Claude Code 2.1.287 or later and are on by default.
claude --version
- Read its footprint. This lists every event it hooks and every API call it makes, without running it.
git clone https://github.com/Tekkiiiii/the-agency claude plugin validate ./the-agency/mods/spawn-ledger
- Install it. Run this in your terminal, then /reload-plugins in an open session.
git clone https://github.com/Tekkiiiii/the-agency && claude --plugin-dir ./the-agency/mods/spawn-ledger
Or ask Claude to set it up
Paste this into Claude Code and it installs spawn-ledger for you:
Install the "spawn-ledger" Claude Code mod from https://github.com/Tekkiiiii/the-agency/tree/main/mods/spawn-ledger. Run claude plugin validate on it first and show me what it can access before you enable it.
More from Tekkiiiii/the-agency
This repository has 5 Claude Code mods on MCPMods.
- agent-ctx: Each agent loop's own context %, measured per request; a one-line CONTEXT_PCT_ALERT rides that agent's next tool result (Low risk)
- context-band: Band above the prompt: context %, tokens, model, cost, prompt-cache size/share/TTL countdown, 5h and weekly usage-window (Review before installing)
- loop-guard: Stall detector per agent loop: 5 identical tool calls in a row warn that loop and leave the session-state.json stall mar (Review before installing)
- voice-compact: Startup token diet: rewrites the long CAVEMAN / PONYTAIL MODE ACTIVE hook-context injections into ~150-token compact rul (Low risk)