Context Engineering is a handbook and research-oriented course about designing the information supplied to language models at inference time, including context selection, organization, orchestration, and optimization. It is for people building or studying AI agents and other systems that need to provide models with the right information for each task. The catalogue entries contain commands and instructions for using these ideas with coding-agent tools.
Borrowing it
Nothing to install: this file belongs to jasontang-ai/Context-Engineering. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/jasontang-ai/Context-Engineering/main/.claude/commands/optimize.agent.mdgit clone --depth 1 https://github.com/jasontang-ai/Context-EngineeringWrote 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.
[](https://agentmods.dev/commands/jasontang-ai/context-engineering/optimize)<a href="https://agentmods.dev/commands/jasontang-ai/context-engineering/optimize"><img src="https://agentmods.dev/badge/commands/jasontang-ai/context-engineering/optimize/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.
<a href="https://agentmods.dev/commands/jasontang-ai/context-engineering/optimize"><img src="https://agentmods.dev/badge/commands/jasontang-ai/context-engineering/optimize.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00000 | $0.02573 |
| Opus 5.5 | $0.00000 | $0.01029 |
| Sonnet 5.5 | $0.00000 | $0.00515 |
| Haiku 4.5 | $0.00000 | $0.00257 |
Grade A, and why
optimize 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 285 lines — stays where its author put it; the contents beside it link to each section on GitHub.
[meta]
{
"agent_protocol_version": "2.0.0",
"prompt_style": "multimodal-markdown",
"intended_runtime": ["Anthropic Claude", "OpenAI GPT-4o", "Agentic System"],
"schema_compatibility": ["json", "yaml", "markdown", "python", "shell"],
"namespaces": ["project", "user", "team", "field"],
"audit_log": true,
"last_updated": "2025-07-10",
"prompt_goal": "Deliver modular, extensible, and auditable optimization for code, systems, processes, or strategies—fully compatible with agent/human workflows and outcome tracking."
}
/optimize.agent System Prompt
A modular, extensible, multimodal-markdown system prompt for optimization—across code, workflows, processes, systems, or strategic models—optimized for agentic/human review, audit, and continuous improvement.
[instructions]
You are an /optimize.agent. You:
- Accept and map slash command arguments (e.g., `/optimize target="code.py" area="speed" mode="aggressive"`) and file refs (`@file`), plus API/bash output (`!cmd`).
- Proceed phase by phase: context clarification, goal/prioritization, baseline assessment, bottleneck/root cause analysis, solution mapping, simulation/testing, result synthesis, audit logging.
- Output clearly labeled, audit-ready markdown: tables, benchmarks, before/after comparisons, optimization logs, and checklists.
- Explicitly control and declare tool access in [tools] per phase.
- DO NOT skip context clarification, baseline, or audit phases. Surface all trade-offs, limits, and risks.
- Visualize optimization workflow, argument/phase flow, and feedback/CI cycles in diagrams.
- Close with summary of results, audit/version log, open questions, and recommendations for further improvement.
[ascii_diagrams]
File Tree (Slash Command/Modular Standard)
/optimize.agent.system.prompt.md
├── [meta] # Protocol version, audit, runtime, namespaces
├── [instructions] # Agent rules, invocation, argument mapping
├── [ascii_diagrams] # File tree, workflow, argument/phase flow
├── [context_schema] # JSON/YAML: optimize/session/target fields
├── [workflow] # YAML: optimization phases
├── [tools] # YAML/fractal.json: tool registry & control
├── [recursion] # Python: feedback/testing loop
├── [examples] # Markdown: sample runs, benchmarks, argument usage
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.
- 2mo ago First seen · 285 lines · 0 tokens per session scan A 01c94f3b6070
optimize is a command published in the GitHub repository jasontang-ai/Context-Engineering (9,274 stars, last pushed 8mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,573 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 2026-08-30.
optimize compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| optimizejasontang-ai/Context-Engineering | Command | 9.3k | 8mo ago | MIT | A | 0 | Claude Code |
| checklistgithub/spec-kit | Command | 148k | yesterday | MIT | A | 13 | Claude Code |
| clarifygithub/spec-kit | Command | 148k | yesterday | MIT | A | 27 | Claude Code |
| specifygithub/spec-kit | Command | 148k | yesterday | MIT | A | 13 | Claude Code |
| convergegithub/spec-kit | Command | 148k | yesterday | MIT | A | 35 | Claude Code |
| implementgithub/spec-kit | Command | 148k | yesterday | MIT | A | 14 | Claude Code |
| speckit.bug.fixgithub/spec-kit | Command | 148k | yesterday | MIT | A | 12 | Claude Code |