Context Preserver

Context Preserver is a skill for Claude Code, Codex from daffy0208/ai-dev-standards. It costs 55 tokens per session (3,509 once invoked), scanned A, original, MIT.

A system for recording the working context of a development task, such as the current files, mental state, and next steps, so work can be resumed later. It is designed for developers who find interruptions and task switching especially costly.

In plain words
What is it for?
Use it when pausing development, switching between tasks, returning after an interruption, or documenting what should happen next.
Why use it?
It reduces the time spent rereading code and trying to remember where a task stopped. It can make breaks and switching tasks less likely to derail ongoing work.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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/daffy0208/ai-dev-standards/context-preserver
Any agent
npx skills add daffy0208/ai-dev-standards --skill context-preserver
Clone the repo
git clone --depth 1 https://github.com/daffy0208/ai-dev-standards

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.

agentmods badge for Context Preserver

README.md
[![agentmods](https://agentmods.dev/badge/skills/daffy0208/ai-dev-standards/context-preserver.svg)](https://agentmods.dev/skills/daffy0208/ai-dev-standards/context-preserver)
Your own site
<a href="https://agentmods.dev/skills/daffy0208/ai-dev-standards/context-preserver"><img src="https://agentmods.dev/badge/skills/daffy0208/ai-dev-standards/context-preserver.svg" alt="Measured on agentmods" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,509 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 5.1 $0.00055 $0.03509
Opus 5 $0.00028 $0.01754
Sonnet 5 $0.00011 $0.00702
Haiku 4.5 $0.00006 $0.00351

Measured 6d ago against content hash c5a0e3a01955, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

Context Preserver 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 6d 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/context-preserver/SKILL.md · 667 lines

How it starts

The opening of the file, as written. The whole thing — 667 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Context Preserver

Never lose your place. Resume in 5 minutes. Eliminate "Where was I?" moments.

Core Principle

ADHD brains have high context-switching costs and limited working memory. Every interruption means 15-30 minutes of "getting back into it." The solution: Automatically capture and restore mental state so you can resume work in under 5 minutes.

Key Insight: The act of saving context is therapeutic - it signals "I can stop safely."


The Context Problem

Problem 1: High Context-Switching Cost

Issue: After breaks, spend 15-30 min remembering what you were doing Result: Lost productivity, frustration, avoidance of breaks

###Problem 2: Working Memory Limits Issue: Can't hold complex state in mind Result: Constant re-reading code, forgetting next steps

Problem 3: Interruption Anxiety

Issue: Fear of losing place prevents taking needed breaks Result: Burnout, health issues, reduced quality

Problem 4: "Where Was I?" Syndrome

Issue: Return to work with no idea what you were doing Result: Thrashing, starting over, wasted time


Phase 1: Automatic Context Capture

What Gets Saved (Auto-Every 15 Minutes)

File Context:

  • Current file path
  • Line number and function
  • Related files (imports, dependencies)
  • Git branch

Mental State:

  • What you were thinking
  • What you just finished
  • What you're about to do
  • Blockers or questions

Environment:

  • Dev server status
  • Open terminals
  • Database state
  • API keys loaded

Time Context:

  • When you started
  • How long you've been working
  • When you plan to stop

Automated Saves

Trigger 1: Every 15 Minutes (Background)
[15:30] Auto-save triggered

Context saved:

- File: src/components/login.tsx:42
- Function: handleSubmit()
- Status: Adding API call
- Next: Error handling for 401
- Time working: 45 min

✅ Saved to .adhd/context.json
✅ Micro-commit created (WIP)
Trigger 2: Before Breaks (Manual Command)

Read the full file on GitHub · 667 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.

  1. 6d ago First seen · 667 lines · 55 tokens per session scan A c5a0e3a01955

Subscribe to this mod's changes

Context Preserver is a skill published in the GitHub repository daffy0208/ai-dev-standards (36 stars, last pushed 8mo ago), licensed MIT. It adds 55 tokens to every session and 3,509 once invoked, about $0.0003 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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