Merge pull request ultraworkers#2921 from ultraworkers/docs/roadmap-381-cache-help-json-hangs

docs(roadmap): add ultraworkers#381 — cache help json hangs

Author: Yeachan-Heo

ROADMAP.md

@@ -6299,3 +6299,4 @@ Original filing (2026-04-18): the session emitted `SessionStart hook (completed)
 357. **Top-level `doctor --help --output-format json` exits successfully but emits plain text help instead of JSON** — dogfooded 2026-04-30 for the 01:30 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `52a909ce`. After rebuilding and verifying the binary provenance, repeated bounded runs of `./rust/target/debug/claw doctor --help --output-format json` exited `0` with `stdout=343` and `stderr=0`, but stdout was plain text (`Doctor`, `Usage`, `Purpose`, `Output`, `Formats`, `Related`) rather than a JSON object. In the same rebuilt binary, `status --help --output-format json` also returned promptly as plain text (#356), confirming a broader help-format fallback class while keeping this pinpoint on the doctor surface. This is distinct from #354/#355 memory/session JSON help/list hangs: doctor help returns promptly, but ignores the requested JSON format. **Required fix shape:** (a) make `doctor --help --output-format json` emit valid stdout JSON with `kind:"help"` or `kind:"doctor"`, `action:"help"`, usage, checks, options, examples, supported output formats, and related slash/direct commands; (b) preserve text help for default/text mode only; (c) add a `format:"json"` or equivalent field so callers can assert the contract without parsing prose; (d) add regression coverage proving doctor help with JSON format parses as JSON and does not silently fall back to plain text. **Why this matters:** doctor is the diagnostic entrypoint users reach for when things are broken. If JSON help falls back to prose, claws cannot discover diagnostic semantics or present structured recovery instructions without scraping formatting-sensitive text. Source: gaebal-gajae dogfood follow-up for the 01:30 nudge on rebuilt `./rust/target/debug/claw` `52a909ce`; invalid hang PR #2911 was closed after repeated bounded repros returned promptly.
 358. **Top-level `cost --help --output-format json` hangs with zero stdout/stderr instead of returning bounded command help JSON** — dogfooded 2026-04-30 for the 02:00 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `d95b230c`. After rebuilding and verifying the binary provenance, repeated bounded runs of `timeout 8 ./rust/target/debug/claw cost --help --output-format json` exited `124` with `stdout=0` and `stderr=0`. In the same rebuilt binary, `version --output-format json` returned promptly with version/build metadata, proving the binary itself and the JSON output path are reachable; the hang is specific to the cost help path, though other help surfaces have separate known JSON contract issues (#356/#357). **Required fix shape:** (a) make `cost --help --output-format json` return static/bounded stdout JSON with `kind:"help"` or `kind:"cost"`, `action:"help"`, usage, options, examples, supported output formats, and related slash/direct commands; (b) ensure help rendering does not initialize slow cost/session/accounting providers; (c) if any dynamic provider is accidentally consulted, return a typed JSON timeout/unavailable error instead of hanging; (d) add regression coverage proving cost help in JSON mode returns within a deterministic budget. **Why this matters:** cost/tokens surfaces are commonly consumed by automation for budgeting. If even cost help can hang silently, claws cannot discover cost command semantics or present safe budget diagnostics before running potentially slow accounting paths. Source: gaebal-gajae dogfood follow-up for the 02:00 nudge on rebuilt `./rust/target/debug/claw` `d95b230c`.
 380. **Top-level `tokens --help --output-format json` hangs with zero stdout/stderr instead of returning bounded command help JSON** — dogfooded 2026-04-30 for the 02:30 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `d95b230c`. After verifying #358 covered `cost --help`, a fresh adjacent probe on the token-budget surface showed the same silent failure class: repeated bounded runs of `timeout 8 ./rust/target/debug/claw tokens --help --output-format json` exited `124` with `stdout=0` and `stderr=0`. In the same rebuilt binary, `version --output-format json` returned promptly with version/build metadata, proving the binary itself and JSON output path are reachable. This is distinct from #358's cost help hang: the affected surface is the sibling `tokens` command help, which agents use before estimating prompt/session token budgets. **Required fix shape:** (a) make `tokens --help --output-format json` return static/bounded stdout JSON with `kind:"help"` or `kind:"tokens"`, `action:"help"`, usage, options, examples, supported output formats, and related slash/direct commands; (b) ensure help rendering does not initialize slow token accounting, session, or provider state; (c) if any dynamic provider is consulted, return a typed JSON timeout/unavailable error instead of hanging; (d) add regression coverage proving tokens help in JSON mode returns within a deterministic budget. **Why this matters:** token budgeting is a preflight clawability surface. If help hangs silently, automation cannot safely discover how to inspect or constrain token usage before running expensive prompts, and budget-aware wrappers stall at the discovery step. Source: gaebal-gajae dogfood follow-up for the 02:30 nudge on rebuilt `./rust/target/debug/claw` `d95b230c`.
+381. **Top-level `cache --help --output-format json` hangs with zero stdout/stderr instead of returning bounded command help JSON** — dogfooded 2026-04-30 for the 03:00 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `d95b230c`. After #358 and #380 landed for the cost/tokens preflight help hangs, a fresh adjacent probe on the cache-control surface showed the same silent failure class: repeated bounded runs of `timeout --kill-after=1s 8s ./rust/target/debug/claw cache --help --output-format json` exited `124` with `stdout=0` and `stderr=0`. In the same rebuilt binary, `version --output-format json` returned promptly with version/build metadata, proving the binary itself and JSON output path are reachable. This is distinct from the separate `/cache` slash-command envelope mismatch class: the affected surface here is top-level `cache` command help, where agents need bounded local discovery before deciding whether to inspect, clear, or summarize cache state. **Required fix shape:** (a) make `cache --help --output-format json` return static/bounded stdout JSON with `kind:"help"` or `kind:"cache"`, `action:"help"`, usage, options, examples, supported output formats, and related slash/direct commands; (b) ensure help rendering does not initialize slow cache/session/provider state; (c) if any dynamic provider is consulted, return a typed JSON timeout/unavailable error instead of hanging; (d) add regression coverage proving cache help in JSON mode returns within a deterministic budget. **Why this matters:** cache inspection and cleanup are recovery/control-plane operations. If cache help hangs silently, claws cannot safely discover cache semantics before attempting cleanup, and automation stalls before it can choose a non-destructive cache action. Source: gaebal-gajae dogfood follow-up for the 03:00 nudge on rebuilt `./rust/target/debug/claw` `d95b230c`.