planning-with-files

planning-with-files is a cursor rule for Cursor from andr-ca/agentharness. It costs 44 tokens per session (810 once invoked), scanned A, original, MIT.

A file-based planning method for complex, multi-step coding or research work. It keeps a task plan, discoveries, and progress in separate Markdown files so the work can continue after context is lost.

In plain words
What is it for?
Use it for migrations, refactors, research projects, and tasks requiring many tool calls.
Why use it?
It prevents important decisions and completed steps from being forgotten during long tasks or context resets.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it for migrations, refactors, research projects, and tasks requiring many tool calls.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/andr-ca/agentharness/planning-with-files
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/andr-ca/agentharness

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 planning-with-files

README.md
[![agentmods](https://agentmods.dev/badge/rules/andr-ca/agentharness/planning-with-files/github.svg)](https://agentmods.dev/rules/andr-ca/agentharness/planning-with-files)
Your own site
<a href="https://agentmods.dev/rules/andr-ca/agentharness/planning-with-files"><img src="https://agentmods.dev/badge/rules/andr-ca/agentharness/planning-with-files/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 planning-with-files

Your own site · 80×15
<a href="https://agentmods.dev/rules/andr-ca/agentharness/planning-with-files"><img src="https://agentmods.dev/badge/rules/andr-ca/agentharness/planning-with-files.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 810 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 $0.00044 $0.00810
Opus 5.5 $0.00018 $0.00324
Sonnet 5.5 $0.00009 $0.00162
Haiku 4.5 $0.00004 $0.00081

Measured 1mo ago against content hash 2d30705ff5bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

planning-with-files 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.

.cursor/rules/planning-with-files.mdc · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Planning with Files

Use this pattern for any task where you can't complete everything in one pass: long refactors, migrations, multi-feature buildouts, research tasks, or anything with more than ~5 tool calls. File-based state survives context resets and gives you (and the user) a running record of what's been done.

Place planning files in docs/operational/ if the harness is linked, or in a .planning/ directory at the project root — whichever exists.

Files to create at the start

task_plan.md

Written before any implementation. Contains:

# Task: <short title>

## Goal
One sentence: what does "done" look like?

## Scope
What's in and what's explicitly out.

## Steps
1. Step one (estimate: small/medium/large)
2. Step two
3. ...

## Open questions
- Question 1 (unblocks: step 3)

## Success criteria
- [ ] Criterion A
- [ ] Criterion B
findings.md

Appended to as you work. Never edited retroactively.

# Findings

## <ISO timestamp>
**Context:** What you were investigating.
**Finding:** What you learned.
**Impact:** Does it change the plan? If yes, add a note to task_plan.md.
progress.md

Updated after each step completes:

# Progress

## Completed
- [x] Step 1 — <one-line summary> (commit: <sha>)

## In progress
- [ ] Step 2 — started <timestamp>

## Blocked
- Step 3 — waiting on: <reason>

## Next action
<Exact next thing to do when resuming>

Workflow

1. Read existing task_plan.md (if present) — don't start a second plan
   for the same task.

2. Write task_plan.md → get user approval on scope before doing anything.

3. For each step:
   a. Write findings to findings.md before and after each discovery.
   b. Do the work (code, commands, searches).
   c. Mark step complete in progress.md; record the commit SHA.
   d. If blocked, record the blocker in progress.md and surface it.

4. When context resets: read progress.md first. Resume from "Next action".

5. When all steps are complete:
   - Verify all success criteria in task_plan.md.
   - Archive or delete the planning files (they're operational docs, not
     permanent — see docs/operational/README.md for the lifecycle).

Read the full file on GitHub · 116 lines

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 · 116 lines · 44 tokens per session scan A 2d30705ff5bb

Subscribe to this mod's changes

planning-with-files is a cursor rule published in the GitHub repository andr-ca/agentharness (1 stars, last pushed 5d ago), licensed MIT. It adds 44 tokens to every session and 810 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 2026-09-03.