What is plan-memory-index?

A compact index of plans that have already been applied, stored separately from the full plan files. It keeps short summaries in memory and points to the detailed plans when needed.

Use it to create dated plan-memory entries, maintain the plan-memory index, and link applied plans to the project’s canonical plans index.

It lets an agent recover relevant past planning context without loading every historical plan or confusing plans with general project memory.

plan-memory-index — Skill for Claude Code and Codex by soulcodex

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 soulcodex/agentic --skill plan-memory-index

Clone the repo

git clone --depth 1 https://github.com/soulcodex/agentic

Made for: Claude Code, Codex.

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/skills/soulcodex/agentic/plan-memory-index/github.svg)](https://agentmods.dev/skills/soulcodex/agentic/plan-memory-index)

Your own site

<a href="https://agentmods.dev/skills/soulcodex/agentic/plan-memory-index"><img src="https://agentmods.dev/badge/skills/soulcodex/agentic/plan-memory-index/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/skills/soulcodex/agentic/plan-memory-index"><img src="https://agentmods.dev/badge/skills/soulcodex/agentic/plan-memory-index.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,069 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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	$0.00040	$0.01069
Opus 5.5	$0.00016	$0.00428
Sonnet 5.5	$0.00008	$0.00214
Haiku 4.5	$0.00004	$0.00107

Measured 1mo ago against content hash 089115a9756d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

plan-memory-index 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.

skills/agentic/plan-memory-index/SKILL.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plan Memory Index Skill

Keep a compact, queryable memory of plans that were already applied, so agents can recover only the right context first and fetch full external issue details later.

Use this skill for concise continuity memory. Do not use it as a full session log.

Step 1 - Ensure Deterministic Storage Layout

Ensure this directory structure exists:

.agentic/
  memories/
    plan-memory/
      index.md
      entries/
  plans/
    INDEX.md

Rules:

Create .agentic/memories/plan-memory/ and .agentic/memories/plan-memory/entries/ when missing.
Keep the memory index filename exactly .agentic/memories/plan-memory/index.md.
Treat .agentic/plans/INDEX.md as the canonical plans index (do not create .agentic/plans/index.md).

Step 2 - Create or Update a Memory Entry

Create one Markdown file per memory entry:

.agentic/memories/plan-memory/entries/YYYY-MM-DD-{plan-slug}.md

Example:

.agentic/memories/plan-memory/entries/2026-05-16-issue-149-plan-memory-index.md

Frontmatter fields:

id: stable unique ID, e.g. plan-memory-2026-05-16-001
plan_slug: kebab-case plan identifier
summary: concise applied-plan excerpt
linked_issues: optional list of GitHub issue URLs
plan_file: optional path to canonical plan file under .agentic/plans/
status: one of draft, in-progress, done, superseded
last_used_at: ISO-8601 UTC timestamp
tags: short list for retrieval

Use memory-entry-template.md.

Step 3 - Enforce Summary Length Guidance

Keep memory entries high signal and small:

summary: target 1 to 3 sentences.
Hard cap: 280 characters.
Do not copy full issue bodies, long logs, or full plans into memory entries.
If more detail is needed, store a short pointer in summary and defer deep fetch.

Step 4 - Upsert `.agentic/memories/plan-memory/index.md`

Create .agentic/memories/plan-memory/index.md from index-template.md if missing. Then add or update a single row for the memory entry.

Read the full file on GitHub · 135 lines

Files

What ships with it

2 files 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.

1mo ago First seen · 135 lines · 40 tokens per session scan A 089115a9756d

Subscribe to this mod's changes

plan-memory-index is a skill published in the GitHub repository soulcodex/agentic (10 stars, last pushed 2d ago), licensed MIT. It adds 40 tokens to every session and 1,069 once invoked, about $0.0002 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.

Memory and context Planning agentic ai ai-tools architecture cli design-pattern indexing

plan-memory-index

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

Plan Memory Index Skill

Step 1 - Ensure Deterministic Storage Layout

Step 2 - Create or Update a Memory Entry

Step 3 - Enforce Summary Length Guidance

Step 4 - Upsert `.agentic/memories/plan-memory/index.md`

What ships with it

What this file has done since we first saw it

Other skills, from other repositories

mnemon

mnemon

mnemon

mnemon

mnemon

mnemon

plan-memory-index

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

Plan Memory Index Skill

Step 1 - Ensure Deterministic Storage Layout

Step 2 - Create or Update a Memory Entry

Step 3 - Enforce Summary Length Guidance

Step 4 - Upsert .agentic/memories/plan-memory/index.md

What ships with it

What this file has done since we first saw it

Other skills, from other repositories

mnemon

mnemon

mnemon

mnemon

mnemon

mnemon

Step 4 - Upsert `.agentic/memories/plan-memory/index.md`