The body is well-organized but verbose — the tokens-per-task framing is restated across multiple sections and conceptual tradeoff prose could be tightened, leaning on knowledge Claude already has. Not a 1 because it avoids explaining truly basic concepts, and not a 3 because several passages do not earn every token.

Provides a copy-paste structured-summary markdown template, a concrete 5-step anchored-iterative procedure, session-profile decision matrices, and worked before/after examples. Not a 2 because guidance is complete and specific rather than pseudocode or abstract; instruction-only absence of executable code is acceptable here since guidance is actionable.

Sequences exist (three-phase workflow, 5-step iterative summarization) but validation checkpoints are not embedded in the workflows — 'validate compressed output against source material' appears only in Gotchas, and compression is information-destructive. Per the rubric, missing validation in destructive operations caps this at 2; not a 1 because steps are clearly sequenced.

One clearly-signaled one-level reference exists (./references/evaluation-framework.md, a real file with 'Read when:' guidance), but the ~270-line body is largely monolithic with six-dimension scoring, calibration tables, and detailed topics that could be split out. The bundled scripts/compression_evaluator.py is never referenced from the body. Not a 1 because sections are organized and a real reference is signaled; not a 3 because most detail is inline and an available bundle file is orphaned.

Lists multiple concrete capabilities — 'context compression, structured summarization, compaction, token-per-task optimization, or durable handoff summaries' — matching the anchor for naming several specific actions. Not a 2 because the actions are concrete and enumerated rather than a vague domain label.

The explicit 'This skill should be used when...' clause gives trigger guidance, while the listed capabilities answer what it does — both what and when are present. Not a 2 because the trigger clause is explicit, not merely implied.

Terms like 'context compression', 'summarization', and 'compaction' are relevant, but 'token-per-task optimization' and 'durable handoff summaries' are technical phrasing rather than what a user naturally says, and common variations ('summarize this conversation', 'agent forgot what it changed') are absent. Not a 3 because natural-user keyword coverage is thin.

The compression niche is somewhat specific, but the description overlaps with adjacent skills (context-optimization, context-degradation, memory-systems) that the body itself disambiguates — a risk the description does not address. Not a 1 because the focus is narrower than 'helps with code and documents', and not a 3 because no disambiguating triggers are given.