Adds the failure-ticket + recovery-routing mechanism: a deterministic
gate->capability table gates whether a stage has agency to fix its own
failure, opens a FailureTicketOpenedEvent when it doesn't, and routes to
a metadata role=recovery stage (per-stage budget, cap 2, not reset by
TransitionExecuted) instead of retrying in place. Extends salvage
decisions with a RECOVER option so the review-gate judge can also route
to recovery, unifies deterministic-gate and review-gate routing through
routeToRecovery(), and has ExecutionPlanCompiler synthesize a
write-capable recovery stage + edge for freestyle plans. Read-only tools
(file_read, list_dir) are now always available on any tool-granting
stage so a recovery stage can inspect the write-less stage's failure
without flooding context via shell ls -R.
Retry-agency invariant: a stage may only retry a gate it has the capability
to change. A write-less stage failing a build/contract/static gate (e.g.
freestyle final_verification with allowedTools=[shell]) can never fix it, so
retrying in place is futile until the budget drains (Vikunja #41).
Instead: open a FailureTicketOpenedEvent (category + requiredCapability derived
deterministically from the gate id, no LLM) and route to a recovery stage that
holds the capability, bounded by a small per-stage route budget.
- Slice 2: SalvageDecision.RECOVER (ternary CONTINUE/RECOVER/FAIL) lets the
review-gate salvage judge hand off to recovery. Shared routeToRecovery()
unifies the deterministic agency guard and the judge on one destination;
decideGateExhaustion now returns StepResult?.
- Return-to-sender: recovery's exit is dynamic (recoveryReturnMove) — it goes
back to the exact ticket-origin stage to re-run its gate, so a write-less
gate anywhere in the graph is handled without skipping intervening stages.
The synthesized recovery->terminal edge is now only a no-ticket fallback.
- Freestyle wiring: ExecutionPlanCompiler injectRecovery flag (Main passes
true) synthesizes a write-capable recovery stage; ticket evidence reaches it
via buildRecoveryTicketEntry.
- Read-only tools always present: StageConfig.effectiveAllowedTools adds
file_read/list_dir to any tool-granting stage (fixes the verifier reaching
for `shell ls -R` to inspect the tree).
Tests: RecoveryRoutingTest (deterministic gate, no static return edge — proves
dynamic return) + GateRetryBudgetExhaustionTest RECOVER case + two compiler
tests. All green; detekt clean.
kami