tree-ring-capture

tree-ring-capture is a command for coding agents from TerminallyLazy/tree-ring-memory-claude-plugin. It costs 13 tokens per session (560 once invoked), scanned A, a copy of tree-ring-capture, MIT.

A command for saving one durable, validated lesson, decision, warning, or preference in Tree Ring Memory, rather than storing a conversation transcript.

In plain words
What is it for?
Use it to record project- or agent-scoped lessons with the required workflow, session, operation, and source details when coordinated mode is used.
Why use it?
It preserves useful information for later work while excluding secrets, raw reasoning, transcripts, and unverified claims.

Command

Part of the tree-ring-memory plugin — 1 skill, 7 commands shipped together

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/terminallylazy/tree-ring-memory-claude-plugin/tree-ring-capture
Clone the repo
git clone --depth 1 https://github.com/TerminallyLazy/tree-ring-memory-claude-plugin

Or install tree-ring-memory, the plugin that ships this one along with the rest of its 1 skill, 7 commands.

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.

agentmods badge for tree-ring-capture

README.md
[![agentmods](https://agentmods.dev/badge/commands/terminallylazy/tree-ring-memory-claude-plugin/tree-ring-capture.svg)](https://agentmods.dev/commands/terminallylazy/tree-ring-memory-claude-plugin/tree-ring-capture)
Your own site
<a href="https://agentmods.dev/commands/terminallylazy/tree-ring-memory-claude-plugin/tree-ring-capture"><img src="https://agentmods.dev/badge/commands/terminallylazy/tree-ring-memory-claude-plugin/tree-ring-capture.svg" alt="Measured on agentmods" height="20"></a>
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 560 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 89% copy Near-identical to another mod 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 $0.00013 $0.00560
Opus 5 $0.00006 $0.00280
Sonnet 5 $0.00003 $0.00112
Haiku 4.5 $0.00001 $0.00056

Measured 3d ago against content hash a999f3c6a1d0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tree-ring-capture 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 3d 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.

Origin

This is a copy

89% identical to tree-ring-capture — 37 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

commands/tree-ring-capture.md · 65 lines

What it actually says

Tree Ring Capture

Capture only durable, useful memory. Do not store transcripts, secrets, credentials, raw chain-of-thought, or unverified claims as truth.

Read project-local .tree-ring/SKILL.md and .tree-ring/CLI.md first when present. Follow the skill's Runtime Bootstrap And Updates procedure and confirm the selected project-local or global binary reports 0.15.0 or newer. Bootstrap or upgrade when the user's request already authorizes it; otherwise obtain permission before downloading or changing software. Never invent a stored memory.

For a single agent or a store in Open mode, use the user's argument as the memory summary:

tree-ring remember "$ARGUMENTS" \
  --event-type lesson \
  --scope project

For an ordinary worker in Coordinated mode, use agent scope with the server/task-derived identity and stable retry metadata:

tree-ring remember "$ARGUMENTS" \
  --event-type lesson \
  --scope agent \
  --agent-profile "$TREE_RING_AGENT_PROFILE" \
  --workflow-id "$TREE_RING_WORKFLOW_ID" \
  --session-id "$TREE_RING_SESSION_ID" \
  --operation-id "<stable logical write id>" \
  --source-ref "<durable task, run, or result reference>"

Do not invent identity values. Reuse the same session and operation IDs only for an exact retry; conflicting reuse fails closed. Keep TREE_RING_COORDINATOR_TOKEN unset in ordinary worker environments.

Adjust --event-type, scope, project, identity, source, and tags to match the actual memory:

  • decision for selected architecture, release, storage, or policy choices
  • lesson for validated work patterns
  • warning for failures and regressions to avoid
  • user_preference for durable user preferences
  • hypothesis for future work that should be revisited as a seed

If the memory comes from a run, test, evaluation, incident, PR, or checkpoint, prefer tree-ring evidence with an --evidence-ref and outcome.

In Coordinated mode, project/shared writes, tree-ring evidence, heartwood, and lifecycle mutations require the one-time coordinator capability already present only in the coordinator process environment. Never put its value in the prompt, a CLI argument, memory, logs, source references, or committed files.

The shared-root concurrency contract covers cooperative processes on one host and a local filesystem. Identity and scope are routing fields, not read ACLs.

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. 3d ago First seen · 65 lines · 13 tokens per session scan A a999f3c6a1d0

Subscribe to this mod's changes

tree-ring-capture is a command published in the GitHub repository TerminallyLazy/tree-ring-memory-claude-plugin (0 stars, last pushed 9d ago), licensed MIT. It adds 13 tokens to every session and 560 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to tree-ring-capture, differing in 37 lines, and is treated as a copy.