Conciseness

The body is dense and prescriptive with almost no explanation of concepts Claude already knows, but the ~38-line dot digraph duplicates the prose Process/Task Loop sections, and key points repeat across sections ("a test you watched fail and then pass" reappears in the Process, the Task Loop, the completion contract, and the rationalizations table), so it is mostly efficient but could be tightened — anchor 3, not 2 because nearly every line is non-obvious guidance rather than padding, and not 4 because the graph/prose duplication is genuine token overhead.

Actionability

Fully executable guidance throughout: exact script invocations ("scripts/task-start PLAN_FILE N", "scripts/task-done PLAN_FILE N BASE -- <test command>", "review-package PLAN_FILE MERGE_BASE HEAD" with "MERGE_BASE = the commit the branch started from, e.g. git merge-base main HEAD") and verbatim ledger line formats ("Task <N>: complete (commits <base7>..<head7>, tests: <command> → <result>)") are copy-paste ready and cover the common cases — anchor 5.

Workflow Clarity

A clearly sequenced multi-step process (Setup → per-task loop → final review → fix pass → finish) with explicit validation checkpoints and feedback loops: every step's "Expected:" line is compared against real output with three defined outcomes, "A failing run records nothing; the task is not complete", a four-item completion contract with evidence, and a fix pass where "a suite that is not green after the pass means the pass is not over" — anchor 5.

Progressive Disclosure

Well-organized sections with clearly signaled one-level-deep references: this skill's scripts/task-start and scripts/task-done exist in the bundle and match their documented usage, and sibling-skill paths ("../subagent-driven-development/scripts/sdd-workspace", "../subagent-driven-development/scripts/review-package", "../requesting-code-review/code-reviewer.md") are each named with what they provide. The ~38-line dot graph and the 14-row rationalizations table are inline content that could live in reference files to keep the core loop lean, leaving minor organization gaps — anchor 4.

Specificity

"executing an implementation plan in the current session as the implementer yourself" names the domain and one core action but lists no other concrete capabilities (the ledger, TDD gating, and final review the body delivers are invisible), fitting anchor 3; the second-person phrasing ("as the implementer yourself", "your human partner chose inline execution") incurs the rubric's voice penalty, reducing it to 2.

Completeness

The "when" is explicit and concrete ("Use when executing an implementation plan... your human partner chose inline execution, or no subagent tool is available") and the "what" is present but thin ("executing an implementation plan... as the implementer yourself"); both are answered with one weaker, fitting anchor 4 rather than 5 because the "what" does not state what the process actually involves.

Trigger Term Quality

"executing an implementation plan", "inline execution", and "no subagent tool is available" are relevant terms, but "inline execution" is skill-family jargon rather than a phrase a user would naturally say, and common variations like "run the plan yourself", "follow the plan", or "implement the plan" are missing — matching anchor 3.

Distinctiveness Conflict Risk

The description carves a clear niche against subagent-driven execution ("as the implementer yourself — your human partner chose inline execution, or no subagent tool is available"), but the shared trigger phrase "executing an implementation plan" leaves minor overlap risk with closely related sibling plan-execution skills, matching anchor 4 rather than 5.