Reading CRUX documents
Skill bodies are served as CRUX Compress documents — a compact semantic notation (spec: compress.md) that typically cuts token cost by 60–85% while preserving every actionable instruction. Your agent reads them in place; there is nothing to decompress.
Document shape
---
generated: 2026-07-05 10:43
sourceChecksum: "3928440484"
cruxLevel: 35
beforeTokens: 2675
afterTokens: 427
reducedBy: 84%
---
# skill-name
```crux
⟦CRUX:skill-name/SKILL.md
Ρ{purpose}
Γ.flow{step1»step2»step3}
R{hard requirements}
Ω{output contract}
⟧
```
The legend
| Marker | Meaning |
|---|---|
Ρ{} · Κ{} | purpose/context · concepts/definitions |
R{} · P{} | requirements · policies/constraints (treat as hard rules) |
Λ{} · Γ{} | commands/actions · workflows (this is the procedure to follow) |
Π{} · Φ{} · M{} ·
Ω{} | architecture · config · state · quality gates / output contract |
→ ← » | maps to · derives from · then (sequence) |
| & ¬ ∀
∃ ∋ | or · and · not · for all · exists · contains |
⊤ ⊥ @ = |
true · false · at path · defined as |
? ! ⊛ ≻ |
optional · required · critical · preferred over |
Rules of thumb
- Treat
Γblocks as the workflow,R/Pas hard constraints,Ωas the output contract. - Paths, commands, and tool names are always verbatim — use them exactly as written.
- One CRUX document carries the whole skill bundle (instructions plus any bundled reference material) — nothing else needs fetching.
When you need the original
skill_get(name, raw=true) returns the uncompressed markdown —
useful when quoting the original text. Occasionally a skill serves raw
markdown by design (format: "raw"): compression is skipped when
it wouldn't pay for itself. Proceed normally.