Conciseness

The body is lean for an index skill: it assumes competence, defers detail to reference files, and carries only non-obvious domain knowledge (e.g., the dispatcher wait-pattern failure mode). Minor trimming is possible — the 'Typical user signals' list partially duplicates the phrases in the Route By User Intent table, and the two-sentence index preamble could be one — so it fits anchor 4 rather than 5.

Actionability

First Commands are copy-paste-ready ('trellis channel list --scope global --all', 'trellis channel forum <board> --scope global') and Core Rules give concrete flag-level guidance (--type forum, --raw, --kind done). Most common operations are executable inline; a few gaps remain (no inline example of spawning a worker or sending a message, though these are deliberately deferred to reference files), placing it between anchors 4 and 5, closer to 4.

Workflow Clarity

A clear sequence is present: run first commands → inspect the named channel/thread before asking for background (an explicit checkpoint) → route by intent table → follow core rules. Checkpoints are mostly present, though verification of outcomes (e.g., confirming a spawned worker actually started, or checking forum state after posting) is left implicit in the reference files, keeping it below anchor 5.

Progressive Disclosure

The body explicitly declares 'This skill is an index. Load only the reference file for the current job', provides an intent→file routing table, and lists all five reference files with one-line descriptions. All referenced files exist (workflows.md's patterns A–F and command-reference.md's 'tag-vs-kind' section were verified present), references are one level deep, and the 'Not For' section adds boundary navigation — a clear match for anchor 5.

Specificity

Lists several specific capability areas — 'spawned workers', 'cross-agent review', 'progress inspection', 'forum channels', 'channel log debugging' — but they are noun phrases rather than concrete verb-actions, and coverage gaps exist (e.g., thread/context management, brainstorm workflows). This sits above anchor 3 (only 1-2 concrete actions) but the nominal phrasing keeps it below anchor 5's comprehensive concrete-action coverage.

Completeness

The 'what' is clear (Trellis channel runtime for collaboration, workers, review, progress, forums, debugging) and the 'for X, Y, Z' construction provides equivalent trigger guidance, but the 'when' is embedded in the capability list rather than stated as an explicit 'Use when...' clause. This matches anchor 4 ('when' could be more explicit) — the capability-list phrasing functions as trigger guidance, so it does not fall to the anchor-3 cap.

Trigger Term Quality

Good natural keywords users would say: 'spawned workers', 'review', 'forum channels', 'progress', 'debugging', 'multi-agent collaboration'. A few natural terms the body itself surfaces are missing from the description — 'brainstorm', 'discuss', 'worker stalled', 'thread' — so it falls just short of anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

'Trellis channel' is a named, niche tool with tool-specific triggers (forum channels, channel log debugging, spawned workers), giving it a clear niche. Minor overlap risk remains with sibling trellis skills (e.g., trellis-session-insight / memory search referenced in the body), which prevents anchor 5.