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 agentmods add skills/attilaszasz/sdd-pilot/markdown-compressionnpx skills add attilaszasz/sdd-pilot --skill markdown-compressiongit clone --depth 1 https://github.com/attilaszasz/sdd-pilotWrote 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/attilaszasz/sdd-pilot/markdown-compression)<a href="https://agentmods.dev/skills/attilaszasz/sdd-pilot/markdown-compression"><img src="https://agentmods.dev/badge/skills/attilaszasz/sdd-pilot/markdown-compression.svg" alt="Measured on agentmods" 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 | $0.00026 | $0.00689 |
| Opus 5 | $0.00013 | $0.00345 |
| Sonnet 5 | $0.00005 | $0.00138 |
| Haiku 4.5 | $0.00003 | $0.00069 |
Grade A, and why
markdown-compression 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 3d 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 — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Markdown Compression
Use this only for safe narrative Markdown or explicitly gated governance prose. This is not a general rewrite tool.
Safe Targets
README.mddocs/**/*.mdspecs/<feature>/research.mdspecs/<feature>/analysis-report.mdspecs/<feature>/manual-test.md
Gated Targets
.github/sddp/workflows/implement-tasks/WORKFLOW.md- exact manifest entry; compresses only prose inside<rules>and<workflow>blocks- all other governance files require a separate manifest entry and dry-run review before compression
Blocked Targets
project-instructions.md,AGENTS.md,CLAUDE.md- all unlisted workflow, agent, instruction, and wrapper Markdown under
.github/,.agents/,.claude/,.windsurf/,.opencode/,.codex/ specs/prd.md,specs/sad.md,specs/dod.md,specs/project-plan.md,specs/adrs/*.md,specs/plan/*.md- feature-workspace parser-sensitive artifacts:
spec.md,plan.md,tasks.md,qc-report.md,checklists/*.md,autopilot-log.md
Process
- Run
node scripts/compress-markdown.mjs --check <path>to confirm the path is allowlisted or explicitly gated and validator-safe. - For preview only, run
node scripts/compress-markdown.mjs --stdout <path>; gated targets automatically use narrative-only mode. - Review the proposed diff. For a manual narrative-only preview, add
--narrative-only. - To write the compressed file, run
node scripts/compress-markdown.mjs <path>. - Run
node scripts/compress-markdown.mjs --idempotent <path>after writing and in CI. - The script creates
<name>.original.mdonce, then preserves it on later runs. - If validation fails, stop. Do not write partial output.
- Symbolic-link paths are blocked; authorization uses the canonical target path.
Validation Guarantees
The validator preserves these elements exactly:
- frontmatter
- headings
- fenced code blocks
- inline code
- bare URLs and Markdown links
- requirement and task identifiers
- table rows
- checkbox lines
- Markdown list prefixes and indented lines
- HTML comment blocks
<rules>and<workflow>tag lines- every line outside gated narrative blocks
- HTML blocks, tables, nested blockquotes, and ordered-parenthesis lists
- original line endings
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.
- 3d ago First seen · 71 lines · 26 tokens per session scan A b12dce395579
markdown-compression is a skill published in the GitHub repository attilaszasz/sdd-pilot (95 stars, last pushed yesterday), licensed MIT. It adds 26 tokens to every session and 689 once invoked, about $0.0001 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 2026-09-03.
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