session-storage

session-storage is a cursor rule for Cursor from coddy-project/coddy-agent. It costs 0 tokens per session (207 once invoked), scanned A, original, MIT.

A storage rule for keeping provider tool-call IDs safe when they are used in file paths. Safe IDs stay unchanged; unsafe or overly long IDs are replaced with a repeatable digest while the original is kept as metadata.

In plain words
What is it for?
Use it when saving and retrieving tool-call session history, especially when IDs come from an external provider.
Why use it?
It prevents unusual or path-like IDs from escaping their intended storage directory, without rejecting valid non-empty IDs or losing the original value.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it when saving and retrieving tool-call session history, especially when IDs come from an external provider.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/coddy-project/coddy-agent/session-storage
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.

Clone the repo
git clone --depth 1 https://github.com/coddy-project/coddy-agent

Made for: Cursor.

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 session-storage

README.md
[![agentmods](https://agentmods.dev/badge/rules/coddy-project/coddy-agent/session-storage/github.svg)](https://agentmods.dev/rules/coddy-project/coddy-agent/session-storage)
Your own site
<a href="https://agentmods.dev/rules/coddy-project/coddy-agent/session-storage"><img src="https://agentmods.dev/badge/rules/coddy-project/coddy-agent/session-storage/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 session-storage

Your own site · 80×15
<a href="https://agentmods.dev/rules/coddy-project/coddy-agent/session-storage"><img src="https://agentmods.dev/badge/rules/coddy-project/coddy-agent/session-storage.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 207 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 $0.00000 $0.00207
Opus 5.5 $0.00000 $0.00083
Sonnet 5.5 $0.00000 $0.00041
Haiku 4.5 $0.00000 $0.00021

Measured 11d ago against content hash 2bedf494ce6f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

session-storage 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 11d 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.

.cursor/rules/session-storage.mdc · 20 lines

What it actually says

Tool-call session storage

  • Provider tool-call IDs are untrusted. Every tool_calls path resolves through ToolCallDirName and the store API.
  • Safe historical IDs remain verbatim. Unsafe, path-like, or overlong IDs map deterministically to tc_<digest>, while metadata stores the raw ID.
  • Do not reject unusual non-empty IDs instead of mapping them.
  • Traversal tests send percent-encoded separators through the real ServeMux.
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. 11d ago First seen · 20 lines · 0 tokens per session scan A 2bedf494ce6f

Subscribe to this mod's changes

session-storage is a cursor rule published in the GitHub repository coddy-project/coddy-agent (175 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 207 tokens. 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 2026-10-05.