Conciseness

The body is lean and assumes Claude's competence — no explanations of concepts Claude already knows, just purpose, trigger, process, rules, patterns, and boundaries. Minor redundancy keeps it from anchor 5: the code/inline-code preservation rule is stated three times ('Preserve EXACTLY - Code blocks/Inline code', 'CRITICAL RULE: Anything inside ``` ... ``` must be copied EXACTLY', and 'Inline code (`...`) must be preserved EXACTLY'), and the out-of-tree backup location is repeated in Purpose and Boundaries. It is well above anchor 3's 'some unnecessary explanation'.

Actionability

Guidance is fully executable: a copy-paste-ready command ('From the directory containing this SKILL.md, run: python3 -m scripts <absolute_filepath>'), a concrete CLI behavior contract (detect, compress, validate, cherry-pick fix, retry up to 2, leave original untouched on failure), specific remove/preserve/compress word lists, and two worked before/after examples covering the common cases. All referenced files (scripts/__main__.py, scripts/compress.py) exist in the bundle.

Workflow Clarity

The 4-step Process has an explicit sequence with validation and feedback loops built in: the CLI 'validate output (no tokens)', 'cherry-pick fix with Claude', 'retry up to 2 times', and on persistent failure 'report error to user, leave original file untouched'. For a destructive operation (original file is overwritten) it also mandates a pre-write backup and skips FILE.original.md, matching anchor 5's explicit validation steps with error-recovery loops.

Progressive Disclosure

The body is well-organized into clear sections (Purpose, Trigger, Process, Compression Rules, Pattern, Boundaries) and correctly delegates implementation to the scripts/ bundle ('The compression scripts live in scripts/... search for scripts/__main__.py') without inlining any of the 47KB compress.py. It sits at anchor 4 rather than 5 because there is no references/ split — the rules, patterns, and boundaries (~70 lines of operational detail) are all inline in SKILL.md with no one-level-deep reference files for cases like mixed prose/code handling, and the Trigger section's guard-rail explanation runs a bit long.

Specificity

The description lists several concrete actions — 'Compress a memory file such as CLAUDE.md or a todo list into caveman format to save input tokens, keeping a readable backup' plus 'Sends the file's text to the configured model provider' — with only minor gaps (e.g., which file types are eligible). It names domain and multiple specific actions but falls short of the comprehensive anchor 5 ('Extract text and tables... fill forms, merge documents, convert pages'), and it is clearly above anchor 3, which covers only 1-2 actions.

Completeness

Both 'what' (compress memory files into caveman format, keep backup, sends text to provider) and 'when' are present, with 'Trigger: /caveman-compress' as explicit invocation guidance — so the missing-'Use when' cap at 3 does not apply. However, the 'when' covers only the slash command and omits conversational triggers ('when the user asks to compress a memory file'), fitting anchor 4's "'when' could be more explicit or specific" rather than anchor 5's concrete trigger phrases.

Trigger Term Quality

Includes natural terms users would say — 'memory file', 'CLAUDE.md', 'todo list', 'compress', 'input tokens' — plus an explicit 'Trigger: /caveman-compress' slash command. A few natural synonyms are missing ('shorten', '.md files', 'token usage'), matching anchor 4's 'good keyword coverage; a few natural terms missing' rather than anchor 5's comprehensive synonym/extension coverage.

Distinctiveness Conflict Risk

The niche is clear and distinct — compressing memory/todo files into caveman-speak to save tokens — with named artifacts (CLAUDE.md, todo list) that no generic skill description would match, giving minimal conflict risk. This matches anchor 5's 'clear niche with distinct triggers'.