Codex --plugin-dir prevents stale sibling Spacedock skill providers

[clkao]

Codex local plugin development now treats the selected plugin-dir channel as authoritative, preventing stale stable or edge skill providers from shadowing checkout changes.

What changed

• Remove stable and edge providers before adding selected Codex plugin dirs.
• Add hermetic prompt-input provider coverage for local plugin-dir installs.
• Update Codex install tolerance and channel-selection tests.
• Document channel-exclusive Codex plugin-dir behavior.

Evidence

• 2074/2074 passed: go test ./...
• 2074/2074 passed: go test ./... -race
• gofmt -l ./cmd ./internal reports pre-existing internal/release/journeydelta.go drift only.

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81

[github-actions]

Journey cost delta

Scenario	Runtime	Model	Turns Δ	Cache Read Δ	Cache Creation Δ	Tokens Δ (total)	Cost Δ (USD)	Duration Δ (ms)	Baseline
feedback-3-cycle-escalation	claude	claude-opus-4-8	+1	+46727	-127	+45697	-0.0000	-5628	latest published
feedback-3-cycle-escalation	claude	sonnet	-1	-51373	+29371	-17509	+0.1045	+4026	latest published
filing	claude	claude-opus-4-8	-4	-132612	-848	-134175	-0.0867	-5019	latest published
filing	claude	sonnet	+7	+356729	+8149	+371984	+0.1863	+74875	latest published
gate-guardrail	claude	claude-opus-4-8	+1	+40396	+1437	+42339	+0.0392	+1391	latest published
gate-guardrail	claude	sonnet	+1	+46198	+915	+52400	+0.0406	+7804	latest published
keep-moving-posture	claude	claude-opus-4-8	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	none (new observation)
keep-moving-posture	claude	sonnet	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	none (new observation)
merge-hook-guardrail	claude	claude-opus-4-8	-2	-83556	+14515	-70154	+0.0238	-10656	latest published
merge-hook-guardrail	claude	sonnet	-3	-113663	-1181	-110917	-0.0338	-6037	latest published
rejection-flow	claude	claude-opus-4-8	+3	-669930	-17919	-704577	-0.6992	-183049	latest published
rejection-flow	claude	sonnet	+0	-2301318	-56078	-2369280	+0.0892	-66128	latest published
self-evidence-merge-triage	claude	claude-opus-4-8	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	none (new observation)
self-evidence-merge-triage	claude	sonnet	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	none (new observation)
shallow-boot	claude	claude-opus-4-8	-1	-12208	+1269	-10526	+0.0122	+18246	latest published
shallow-boot	claude	sonnet	+1	+56474	+3124	+66402	+0.0730	+15416	latest published
shallow-boot-window	claude	claude-opus-4-8	-1	-388	+1770	+1381	+0.0000	+0	latest published
shallow-boot-window	claude	sonnet	+1	+2977	+260	+3237	+0.0000	+0	latest published
smallest-sufficient-mechanism	claude	claude-opus-4-8	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	none (new observation)
smallest-sufficient-mechanism	claude	sonnet	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	n/a (new)	none (new observation)