forget

A tool for removing, undoing, or correcting information stored in MemMesh, a memory system for coding agents. It asks for confirmation and normally hides deleted items without erasing their history.

In plain words
What is it for?
Removing a saved memory, undoing a recent save, or replacing an old fact with a corrected one.
Why use it?
It prevents outdated, incorrect, or sensitive information from continuing to affect future answers. Corrections can keep a record of what changed.

Skill for Claude CodeCodex

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 skills/thinkfleetai/memmesh/forget
Any agent
npx skills add ThinkfleetAI/memmesh --skill forget
Clone the repo
git clone --depth 1 https://github.com/ThinkfleetAI/memmesh

Made for: Claude Code, Codex.

Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 416 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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.

ModelPer sessionOnce invoked
Fable 5 $0.00073 $0.00416
Opus 5 $0.00036 $0.00208
Sonnet 5 $0.00015 $0.00083
Haiku 4.5 $0.00007 $0.00042

Measured 2d ago against content hash 3759e01e86f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

forget 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 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.

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.

integrations/memmesh-plugin/skills/forget/SKILL.md · 46 lines

What it actually says

forget

Remove or correct what's in memory. Always confirm before deleting.

1. Find it

{ "name": "memory_search", "arguments": { "query": "<what to forget>", "projectId": "<repo>", "limit": 10 } }

Show the matches (id + content) and ask which to remove.

2. Delete

{ "name": "memory_delete", "arguments": { "id": "<id>" } }          // soft: status→rejected, sync-safe
{ "name": "memory_delete", "arguments": { "id": "<id>", "hard": true } }  // physical: GDPR / cleanup only

Default to soft delete — it stops surfacing in search and propagates the rejection to peer stores over sync. Use hard: true only for right-to-forget or operator cleanup.

Correction vs deletion

If the fact changed (not "was wrong to store"), don't delete — record a correction so provenance survives: memory_observe the new statement, then memory_supersede the stale id byId the new one. The engine also supersedes automatically when you observe a contradiction, so plain memory_observe is often enough.

Undo a just-added memory

If the user says "undo that" right after a save, search for the most recent item in scope (memory_list), confirm it's the one, and memory_delete it.

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. 2d ago First seen · 46 lines · 73 tokens per session scan A 3759e01e86f0

Subscribe to this mod's changes

forget is a skill published in the GitHub repository ThinkfleetAI/memmesh (440 stars, last pushed 7d ago), licensed Apache-2.0. It adds 73 tokens to every session and 416 once invoked, about $0.0004 per session on Opus 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 2026-08-30.

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