docs(roadmap): add #374 — sandbox active/filesystem_active contradiction; fallback_reason prose only

ROADMAP.md

@@ -6294,3 +6294,5 @@ Original filing (2026-04-18): the session emitted `SessionStart hook (completed)
 352. **Top-level `plugins update <missing-plugin> --output-format json` sends a generic JSON error envelope to stderr only, leaving stdout empty** — dogfooded 2026-04-29 for the 23:00 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `5eb1d7d8`. After rebuilding and verifying the binary provenance, repeated bounded runs of `timeout 8 ./rust/target/debug/claw plugins update does-not-exist --output-format json` exited `1` with `stdout=0` and `stderr=97`; stderr contained JSON (`{"error":"plugin `does-not-exist` is not installed","hint":null,"kind":"unknown","type":"error"}`), but stdout was empty. In the same rebuilt binary, `plugins list --output-format json` returned stdout JSON promptly with the known plugin inventory payload. This is distinct from #350's missing-target `plugins enable` zero-byte timeout and parallel to #351's `plugins disable` stderr-only JSON envelope: update fails fast, but the JSON-mode error lives on stderr only and uses generic `kind:"unknown"`/`type:"error"` instead of a plugin-specific not-found contract. **Required fix shape:** (a) define and consistently document stdout/stderr placement for JSON-mode lifecycle errors; (b) return a plugin-specific typed error with `kind:"plugin"` or `domain:"plugin"`, `action:"update"`, `status:"not_found"` or `code:"plugin_not_found"`, `plugin`, and optional `available_plugins[]`; (c) share missing-target error-envelope behavior across disable/update/uninstall and reconcile it with enable's timeout path; (d) add regression coverage proving `plugins update does-not-exist --output-format json` produces a typed plugin-not-found JSON contract on the documented stream. **Why this matters:** update is a maintenance/control-plane operation often run in automation. A stale plugin name should produce a predictable, domain-specific not-found result, not require callers to special-case stderr-only generic error envelopes after explicitly requesting JSON. Source: gaebal-gajae dogfood follow-up for the 23:00 nudge on rebuilt `./rust/target/debug/claw` `5eb1d7d8`; invalid hang PR #2894 was closed after repeated bounded repros returned exit 1 with JSON on stderr.
 353. **Top-level `plugins uninstall <missing-plugin> --output-format json` sends a generic JSON error envelope to stderr only, leaving stdout empty** — dogfooded 2026-04-29 for the 23:30 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `6f92e54d`. After rebuilding and verifying the binary provenance, repeated bounded runs of `timeout 8 ./rust/target/debug/claw plugins uninstall does-not-exist --output-format json` exited `1` with `stdout=0` and `stderr=97`; stderr contained JSON (`{"error":"plugin `does-not-exist` is not installed","hint":null,"kind":"unknown","type":"error"}`), but stdout was empty. In the same rebuilt binary, `plugins list --output-format json` returned stdout JSON promptly with the known plugin inventory payload. This is distinct from #350's missing-target `plugins enable` zero-byte timeout and parallel to #351/#352 for disable/update: uninstall fails fast, but the JSON-mode error lives on stderr only and uses generic `kind:"unknown"`/`type:"error"` instead of a plugin-specific not-found contract. **Required fix shape:** (a) define and consistently document stdout/stderr placement for JSON-mode lifecycle errors; (b) return a plugin-specific typed error with `kind:"plugin"` or `domain:"plugin"`, `action:"uninstall"`, `status:"not_found"` or `code:"plugin_not_found"`, `plugin`, and optional `available_plugins[]`; (c) share missing-target error-envelope behavior across disable/update/uninstall and reconcile it with enable's timeout path; (d) add regression coverage proving `plugins uninstall does-not-exist --output-format json` produces a typed plugin-not-found JSON contract on the documented stream. **Why this matters:** uninstall is the most destructive plugin lifecycle action. A stale plugin name should produce a predictable, domain-specific not-found result before cleanup hooks or loader work, not require callers to special-case stderr-only generic error envelopes after explicitly requesting JSON. Source: gaebal-gajae dogfood follow-up for the 23:30 nudge on rebuilt `./rust/target/debug/claw` `6f92e54d`; invalid hang PR #2897 was closed after repeated bounded repros returned exit 1 with JSON on stderr.
 354. **Top-level `memory list` and `memory help` with `--output-format json` hang with zero stdout/stderr instead of returning bounded memory inventory/help or a typed unavailable response** — dogfooded 2026-04-30 for the 00:00 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `19947545`. After rebuilding and verifying the binary provenance, bounded runs of `timeout 8 ./rust/target/debug/claw memory list --output-format json` produced `stdout=0` and `stderr=0`; the first sample exited `124` and the second sample was still stuck until killed. A follow-up sanity check of `timeout 8 ./rust/target/debug/claw memory help --output-format json` also exited `124` with `stdout=0` and `stderr=0`, so the issue is broader than list inventory: even the memory help path can hang silently in JSON mode. This is distinct from prior plugin lifecycle stream/status items: the affected surface is memory command introspection, where claws need safe local help/inventory before reading or mutating memory. **Required fix shape:** (a) make `memory help` and `memory list --output-format json` return bounded local JSON without requiring external/authenticated backing store availability; (b) return stdout JSON with `kind:"memory"`, `action:"help"|"list"`, `status`, usage or `entries[]`, source/provenance, counts, and truncation metadata; (c) if credentials/config/backing store are missing or slow, return a typed JSON unavailable/config/timeout error instead of hanging; (d) add regression coverage proving both `memory help --output-format json` and `memory list --output-format json` return machine-readable outcomes within a deterministic budget. **Why this matters:** memory is a core clawability surface. If even help/list can hang silently with no bytes, agents cannot tell whether memory is empty, unavailable, remote-auth blocked, or deadlocked, and any higher-level recall/debug flow stalls at the first introspection step. Source: gaebal-gajae dogfood follow-up for the 00:00 nudge on rebuilt `./rust/target/debug/claw` `19947545`.
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+374. **`/sandbox --output-format json` has an ambiguous `active: false` vs `filesystem_active: true` combination with no `active_mode` discriminator; `fallback_reason` is prose only with no structured `{required_capability, platform, remedy}` fields** — dogfooded 2026-04-30 by Jobdori on `8e24f304`. Running `/sandbox --output-format json` on macOS aarch64 returns: `{"active":false,"filesystem_active":true,"supported":false,"enabled":true,"fallback_reason":"namespace isolation unavailable (requires Linux with `unshare`)"}`. Two issues: (1) `active: false` and `filesystem_active: true` appear contradictory — if filesystem sandboxing is active, why is `active: false`? There is no `active_mode` field explaining that `active` means "full namespace sandbox" while `filesystem_active` means "workspace-only filesystem sandbox". An orchestrator checking `if active { sandboxed } else { unsandboxed }` would incorrectly conclude the session is unsandboxed when filesystem restrictions are actually in effect. (2) `fallback_reason` is a prose string "namespace isolation unavailable (requires Linux with `unshare`)". A programmatic actor wanting to know what capability is missing and how to fix it must parse prose. **Required fix shape:** (a) add `active_mode: "none" | "filesystem_only" | "namespace" | "full"` to unambiguously describe the current isolation level; (b) when `active: false` but `filesystem_active: true`, document that this means `active_mode: "filesystem_only"`; (c) replace or supplement `fallback_reason` prose with `fallback: {missing_capability: "linux_namespaces", platform_required: "linux", remedy: "run on Linux with unshare support"}` structured object; (d) add regression coverage confirming `active_mode` is one of the four canonical values. Source: Jobdori live dogfood, mengmotaHost, `8e24f304`, 2026-04-30.