Skillscript

Per Perry's ec74e5fd test-pass. v0.9.8 shipped a derivation rule with a
gap: skills with text/file/none output AND no autonomous triggers were
landing in headless instead of skills. Cold agents calling skill_list()
at session start couldn't see this common skill class — hello,
cut-release-tag, agent-callable analyzers, etc.

Fixed

Derivation rule grew an "agent-invokable inference" branch:

ANY output[i].kind === "agent"        → "augmenting"
else ANY output[i].kind === "template" → "template"
else IF no autonomous triggers        → "template" (agent-invokable inference)
else                                  → "headless"

The trigger-presence check disambiguates:

• text/file/none output + NO triggers = "I expect to be invoked" → skills
• text/file/none output + cron/session/event triggers = "I fire myself" → headless

Verification table:

• cut-release-tag (output=text, no triggers) → Template ✓ (was Headless)
• hello (output=[], no triggers) → Template ✓
• analyzer (output=[], no triggers) → Template ✓
• queue-length-monitor (output=[], cron trigger) → Headless ✓ (unchanged)
• service-health-watch (output=none, cron trigger) → Headless ✓ (unchanged)
• morning-brief (output=agent, cron trigger) → Augmenting ✓ (unchanged)
• classify-support-ticket (output=agent, no triggers) → Augmenting ✓ (unchanged)

Process note pinned

Perry's ec74e5fd flagged that v0.9.8 pushed without her pre-push test pass
— deviation from the v0.9.6/v0.9.7 "share in shared → test pass → push"
pattern. The probe-pass-finds-bug here would have caught this pre-push.
The pattern is load-bearing even when discipline is high; v0.9.9 onward,
hold the push until Perry's signal.

Lesson banked

When tightening a derivation rule to handle a new dimension (multi-output),
re-walk the original cases to verify they still resolve correctly. Same
shape as 1bc9d7a2 (multi-layer-check-inconsistency) at the derivation-rule
layer: lose a branch silently, faithful downstream impl misses it, only
catches at wire-surface probe.