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history-health

history-health is a skill for Claude Code, Codex from OutlineDriven/odin-claude-plugin. It costs 23 tokens per session (1,016 once invoked), scanned A, original, Apache-2.0.

A read-only audit of what the coding agent's recall system supplied to agents over time.

In plain words
What is it for?
Use it to view bounded event records filtered by agent harness, including times, session counts, byte counts, and empty-result status.
Why use it?
It helps you inspect recall usage without replaying or changing stored conversations, and distinguishes a missing command-line tool from an empty log.

Skill for Claude CodeCodex

Written for Claude Code and Codex: disable-model-invocation in frontmatter, but also agents/openai.yaml present.

Part of the odin-knowledge plugin — 23 skills shipped together

not rated 39repo +2 25d ago A scan 23 tokens original Apache-2.0

Good fit Use it to view bounded event records filtered by agent harness, including times, session counts, byte counts, and empty-result status.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/outlinedriven/odin-claude-plugin/history-health
View source ↗ OutlineDriven/odin-claude-plugin outlinedriven.github.io
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.

Any agent
npx skills add OutlineDriven/odin-claude-plugin --skill history-health
Clone the repo
git clone --depth 1 https://github.com/OutlineDriven/odin-claude-plugin

Made for: Claude Code, Codex.

Or install odin-knowledge, the plugin that ships this one along with the rest of its 23 skills.

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 history-health

README.md
[![agentmods](https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/history-health/github.svg)](https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/history-health)
Your own site
<a href="https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/history-health"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/history-health/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.

agentmods 80×15 button for history-health

Your own site · 80×15
<a href="https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/history-health"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/history-health.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,016 The whole file, excluding the scripts and references it only reads on demand.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00023 $0.01016
Opus 5.5 $0.00009 $0.00406
Sonnet 5.5 $0.00005 $0.00203
Haiku 4.5 $0.00002 $0.00102

Measured 1mo ago against content hash 8594c8b58f7b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

history-health 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 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.

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.

plugins/odin-knowledge/skills/history-health/SKILL.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

History usage audit

Contract

Field Bound contract
Trigger User explicitly audits what recall fed agents.
Authority Read-only. No file, VCS, credential, paid, published, deployed, or remote mutation.
Side effect None.
Done A bounded event table reports kind, time, session count, bytes, and empty-result flag, or a null object when absent; model-facing digest replay is refused.

Inputs

  • deja CLI installed and reachable via PATH. Required; absent tool yields an explicit error object.
  • harness filter (optional). Passed as --harness <name> to the CLI. A harness name string such as "claude" or "cursor". When omitted, events from all harnesses are included.
  • limit (optional). Passed as --limit <n> to the CLI. Maximum events to return, an integer >= 1. Defaults to 50 when omitted.

Procedure

  1. Verify deja is in PATH. Run command -v deja. If absent, return { "error": "deja CLI not found in PATH", "hint": "install or rebuild deja" }. Do not conflate a missing CLI with an empty log. Done when: the CLI is confirmed present or the error object is returned.

  2. Run deja log --json --limit 50 with the harness filter if supplied: deja log --json --harness <name> --limit 50. When the user supplies a custom limit, use that value instead of 50. Done when: the command is executed.

  3. Capture stdout and exit code. Done when: stdout and exit code are captured.

  4. If exit code is non-zero, return { "error": "deja log failed", "hint": "install or rebuild deja" }. Done when: the error is returned.

  5. If stdout is the exact string null\n, return null. Done when: null is returned.

  6. Parse stdout as JSON. If parse fails, return { "error": "malformed JSON from deja log" }. Done when: the JSON is parsed or the error is returned.

  7. The parsed value is a JSON array of event objects or null. Done when: the value type is determined.

  8. If the parsed value is null, return null. Done when: null is returned.

Read the full file on GitHub · 70 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 70 lines · 23 tokens per session scan A 8594c8b58f7b

Subscribe to this mod's changes

history-health is a skill published in the GitHub repository OutlineDriven/odin-claude-plugin (39 stars, last pushed 25d ago), licensed Apache-2.0. It adds 23 tokens to every session and 1,016 once invoked, about $0.0001 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 2026-09-13.

Analytics and metricsClaude CodeMemory and contextclaude-code-pluginclaude-code-pluginsclaude-marketplaceclaude-pluginsoutline-driven-development
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