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.
npx skills add ChanMeng666/archlang --skill archlang-edit-plangit clone --depth 1 https://github.com/ChanMeng666/archlangWrote 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/skills/chanmeng666/archlang/archlang-edit-plan)<a href="https://agentmods.dev/skills/chanmeng666/archlang/archlang-edit-plan"><img src="https://agentmods.dev/badge/skills/chanmeng666/archlang/archlang-edit-plan/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/skills/chanmeng666/archlang/archlang-edit-plan"><img src="https://agentmods.dev/badge/skills/chanmeng666/archlang/archlang-edit-plan.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 | $0.00102 | $0.00932 |
| Opus 5.5 | $0.00041 | $0.00373 |
| Sonnet 5.5 | $0.00020 | $0.00186 |
| Haiku 4.5 | $0.00010 | $0.00093 |
Grade A, and why
archlang-edit-plan 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 today.
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 — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Edit an existing plan
Change a .arch file without breaking what already works.
If archlang is not on the path, write npx -y @chanmeng666/archlang in its place.
Never run a bare arch: on Linux, macOS and Git Bash that name is the coreutils command.
This skill is a workflow, not a language reference. Run archlang spec for the language and
archlang <cmd> --help for a command's flags.
Steps
- Record the starting state. Run
archlang validate plan.arch --jsonandarchlang describe plan.arch --select rooms,totals --json. Keep both results: they are what you compare against at the end. If the plan already has errors, tell the user before you edit. - Read only what the change touches.
archlang describe plan.arch --room <ids> --jsonreturns those rooms with the doors, windows and furniture that touch them.archlang describe plan.arch --select freedom --jsonsays which positions the author typed (absolute) and which the compiler derives. Change a typed number; a derived one moves by itself when the thing it depends on moves. - Read the language for the forms you will write.
archlang spec. - Make the smallest edit. Change the statements the request names and leave the rest as they are: same ids, same order, same comments. Do not reformat the file and do not rewrite statements you were not asked to change. When a room changes size, check the walls, doors, windows and neighbouring rooms that share its edges.
- Compile.
archlang compile plan.arch -o plan.svg --json. Ifokis false, preview the mechanical fixes witharchlang fix plan.arch --dry-run --jsonand read the diff before you apply them witharchlang fix plan.arch --backup. - Move furniture out of the way if needed. If the edit pushed a piece into a wall, a doorway
or a door swing,
archlang repair plan.arch -o plan.archmoves it. Readunresolvedfor the pieces it could not move. - Verify the change and nothing else. Run the two commands from step 1 again. The rooms you meant to change differ as intended. Every other room has the same area and the same connections. No diagnostic is new unless the request causes it; if one is, tell the user.
- Refresh the sheet if the drawing grew.
archlang finish plan.arch --dry-run --jsonshows what is missing. If it reports that the drawing no longer fits the authoredpaperorscale,archlang finish plan.arch --reissuemay replace those two statements and nothing else.
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.
- today Changed · +1 lines · +1 tokens per session c36bbe95aa8e
- 4d ago First seen · 57 lines · 101 tokens per session scan A 1eceb78cccdd
archlang-edit-plan is a skill published in the GitHub repository ChanMeng666/archlang (18 stars, last pushed today), licensed MIT. It adds 102 tokens to every session and 932 once invoked, about $0.0004 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 2026-10-10.
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