feat(persona-kit): lint integration mount scopes at deploy - #311
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A persona's `scope` decides two things at once: which Relayfile paths the
sandbox mirrors, and what the runtime token may touch. Both failure modes are
silent. A scope the mount rejects mirrors nothing, so reads come back empty and
writebacks land on unmounted disk as no-ops — the agent reports success and does
nothing.
`lintScopes` walks `integrations[].scope` and warns, non-fatally, on the same
channel `lintTriggers` already uses: surfaced by `deploy` before any side
effect, and returned on `DeployResult.warnings`.
Six of the seven rules mirror cloud's authoritative `relayfile/mount-intent.ts`,
so a path this lint flags is one the mount would also reject: non-absolute,
trailing slash, mid-path wildcard, traversal segment, an explicitly empty
`scope: {}`, and a provider-root `/slack/**`.
The seventh is a judgment call, and is the reason this was written. The mount is
*traversed* at sandbox boot, so its size is paid on every run — but size is
invisible in the glob. `/slack/channels/**` is syntactically identical to
`/linear/issues/**`; in one real workspace it was ~5,950 entries (2,008 files,
3,940 directories), could not converge inside the mount budget, and left runs
either degraded ("scoped initial sync failed; continuing without preloaded
reads") or failing outright with exit 124 once cloud began cancelling
non-converging mounts at the hard deadline. Narrowing to the single channel the
agent posted to took that bootstrap to a clean 127s.
So `HIGH_CARDINALITY_ROOTS` names the collections that grow with workspace
history rather than with configuration — Slack channels, Gmail messages and
threads — and warns only on those. It is deliberately a short list rather than a
rule about terminal `/**`: flagging every `/linear/issues/**` would be noise that
trains authors to ignore the warning. Being on the list is not an error either;
a read-heavy agent may genuinely need the collection. The warning asks the author
to confirm that, and points write-only agents at the cheaper single-entry scope —
posting never needed the mirror, only the grant.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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📝 WalkthroughWalkthroughAdded non-throwing persona scope linting with structured issues and validation for paths, wildcards, and broad roots. Exported the API from ChangesPersona scope linting
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to Deploy can still accept an individual empty scope without warning, allowing a persona to run with an ineffective mirror and silently miss expected reads or writebacks. Fixing this validation gap and adding coverage is needed before merge. Suggested reviewers: Poem
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 1
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Inline comments:
In `@packages/persona-kit/src/scopes.ts`:
- Around line 116-117: Update the scope-value processing around raw.trim() to
emit the scope_empty warning for empty or whitespace-only values before
continuing, while preserving existing handling for non-empty values. Add
coverage for an individual empty scope value.
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packages/deploy/src/preflight.tspackages/persona-kit/src/index.tspackages/persona-kit/src/scopes.test.tspackages/persona-kit/src/scopes.ts
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| const value = raw.trim(); | ||
| if (!value) continue; | ||
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| if (!value.startsWith('/')) { |
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When a persona uses the documented connection-scope contract—for example github: { scope: { repo: "org/repo" } } or Slack { channel: "C123" }—this branch emits scope_not_absolute, even though PersonaIntegrationConfig and the adapter scope-key catalog define these values as provider-specific filter metadata rather than Relayfile paths. Consequently existing valid personas now produce false deploy warnings, and following the warning would replace valid adapter input with a different representation; path validation must be limited to actual mount-path fields or performed after translating provider filters into mount paths.
Useful? React with 👍 / 👎.
| // explicitly EMPTY scope object reads as "I meant to scope this" while | ||
| // mirroring nothing, which is the trap worth naming. | ||
| const scope = config.scope; | ||
| if (isRecord(scope) && Object.keys(scope).length === 0) { |
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In the deploy path this condition cannot observe an authored scope: {}: compileAgentSource first calls parsePersonaSpec, and parseIntegrationConfig only assigns out.scope when the parsed map has at least one key (parse.ts lines 772–776). The empty object is therefore converted to an omitted scope before preflightPersona calls lintScopes, so the advertised scope_empty deploy warning is never emitted; lint the raw source or preserve explicit emptiness through parsing.
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| const value = raw.trim(); | ||
| if (!value) continue; |
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For path-valued scopes containing surrounding whitespace, this validates a different string from the one deployed: parseStringMap preserves the original value, while raw.trim() can turn a rejected value such as "/linear/issues/** " into a clean terminal glob. The untrimmed value is still forwarded to the cloud and can produce the silent empty mount this lint is intended to catch; either normalize the stored scope before deployment or run the checks against raw and flag whitespace.
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Review caught that `scope` is overloaded, and the first cut of this lint only
knew about half of it. `PersonaIntegrationConfig` documents `scope` as
"provider-specific filter metadata" — `{ repo: 'org/repo' }` for github,
`{ database: '<id>' }` for notion — while the cloud-persona docs use it for
Relayfile mount globs. Both are real and both ship today.
`scope_not_absolute` therefore fired on correct personas. `'org/repo'` is not a
path missing its anchor, and nothing in the value tells the two apart, so the
rule is removed and every remaining path rule now applies only to `/`-leading
values. A warning channel works only while every warning is worth reading;
this one stays silent where it cannot be sure.
`scope_empty` is removed for the opposite reason — it could never fire.
`parseIntegrationConfig` assigns `out.scope` only when the parsed map is
non-empty, so an authored `scope: {}` is already `undefined` by the time deploy
lints it, and indistinguishable from an omitted scope (which is legitimate: a
credential-only provider like an MCP server has no Relayfile side). Shipping it
advertised protection that did not exist.
Two real gaps it missed are now covered, both from `parseStringMap` storing
values verbatim:
- `scope_empty_value` — `{ channels: '' }` survives parsing and reaches the
mount, where it matches nothing under either interpretation. The old code
skipped it via `if (!value) continue`.
- `scope_untrimmed` — the lint checked `raw.trim()` while deploy forwards the
original, so a padded path linted clean and then failed to match at the mount.
It now lints the exact string deploy sends and flags the padding.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Took all four findings; three were right and one changed the design.
So
Both
Net: 8 codes → 7, of which the two removed were wrong and two new ones cover gaps. |
Review caught both. "A write does not need the mirror — only the grant" is too strong, and §1 of this same skill says why: when the mirror is stuck rather than merely un-preloaded, the writeback cannot be acknowledged either — `ts: ''`, and the run is marked FAILED on the teardown flush. What was actually observed is narrower: the agent kept posting through runs that logged `scoped initial sync failed; continuing without preloaded reads`, where the mount was up and only the preload had been skipped. Reworded to say that, and to point out that the narrow scope fixes both cases because it is cheap enough to converge — which is the actual advice. Also drops the present tense on `lintScopes()`, which is not released yet (AgentWorkforce/workforce#311). Promising a warning that no vendored deploy emits would leave authors trusting a gate that isn't there. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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1 issue found across 2 files (changes from recent commits).
Prompt for AI agents (unresolved issues)
Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.
<file name="packages/persona-kit/src/scopes.ts">
<violation number="1" location="packages/persona-kit/src/scopes.ts:123">
P3: `scope_empty_value` and `scope_untrimmed` run before the `/`-guard, so they also fire on non-`/` filter-metadata values (e.g. `{ database: 'abc123 ' }`), contradicting the module doc's claim that values not starting with `/` are "left alone" and that "this lint says nothing about it." The `scope_untrimmed` message is also mount-specific ("the mount sees the padded string and will not match") even for metadata values that never reach the mount. Move the `if (!value.startsWith('/')) continue;` guard above these two checks so the empty/padded rules only apply to path-shaped values, or give the metadata case its own message.</violation>
</file>
Reply with feedback, questions, or to request a fix.
Re-trigger cubic
| // here would clear a padded path that then fails at the mount. | ||
| const value = raw; | ||
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| if (!value.trim()) { |
There was a problem hiding this comment.
P3: scope_empty_value and scope_untrimmed run before the /-guard, so they also fire on non-/ filter-metadata values (e.g. { database: 'abc123 ' }), contradicting the module doc's claim that values not starting with / are "left alone" and that "this lint says nothing about it." The scope_untrimmed message is also mount-specific ("the mount sees the padded string and will not match") even for metadata values that never reach the mount. Move the if (!value.startsWith('/')) continue; guard above these two checks so the empty/padded rules only apply to path-shaped values, or give the metadata case its own message.
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At packages/persona-kit/src/scopes.ts, line 123:
<comment>`scope_empty_value` and `scope_untrimmed` run before the `/`-guard, so they also fire on non-`/` filter-metadata values (e.g. `{ database: 'abc123 ' }`), contradicting the module doc's claim that values not starting with `/` are "left alone" and that "this lint says nothing about it." The `scope_untrimmed` message is also mount-specific ("the mount sees the padded string and will not match") even for metadata values that never reach the mount. Move the `if (!value.startsWith('/')) continue;` guard above these two checks so the empty/padded rules only apply to path-shaped values, or give the metadata case its own message.</comment>
<file context>
@@ -88,46 +102,58 @@ export function lintScopes(persona: PersonaSpec): ScopeLintIssue[] {
+ // here would clear a padded path that then fails at the mount.
+ const value = raw;
+
+ if (!value.trim()) {
issues.push({
level: 'warning',
</file context>
Applying this lint to the fleet it was written for showed it warning on the
CORRECT configuration.
Cloud rewrites a picker-gated collection scope down to the single record the
deploy input resolves to — `/slack/channels/**` becomes
`/slack/channels/<id>/**` for reads and writebacks alike (`persona-deploy.ts`,
`pickerTargetPath`). It fires when the integration carries `enabledByInput` and
the named input carries a `picker` whose provider and resource match the scope
being narrowed.
That arrangement is the right answer, and strictly better than the alternative
the warning was nudging people toward: hard-coding a channel id in the scope
pins one channel and takes the choice away from the operator, because scope does
not interpolate inputs. Flagging it would have pushed authors from the good fix
to the worse one.
`isPickerNarrowed` mirrors cloud's own matching (lowercased provider, resource
stripped of surrounding slashes) so the lint stays silent exactly where cloud
acts. A gate WITHOUT a matching picker still warns: `enabledByInput` alone
narrows nothing, so the broad mount is still paid.
Verified against the seven watchdog personas: Slack is now clean on all of them,
and the lint still surfaces the two costs nobody has addressed —
`/google-mail/{messages,threads}/**` on six agents, and a `/github/**` provider
root on meeting-actions.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
…sion (#95) * docs(creating-cloud-persona): scope is a boot cost, not just a permission The skill's prose already said to prefer concrete subpaths, but its example handed authors `slack: { scope: { channels: '/slack/channels/**' } }` — and the example is what gets copied. Every agent in the watchdog fleet carries that line. It is not merely broad. The mount is traversed when the sandbox starts, so its size is paid on every run, and `/slack/channels/**` measured ~5,950 entries (2,008 files, 3,940 directories) in a real workspace. Runs came up degraded ("scoped initial sync failed; continuing without preloaded reads") and then failed outright with exit 124 once cloud began cancelling non-converging mounts at the hard deadline. Narrowing to the one channel the agent posts to took the same bootstrap to a clean 127s. Rewrites the example to hoist the channel id to a constant and scope that single channel, and adds the two things that were nowhere in the doc: - A write needs the *grant*, not the mirror. That agent kept posting fine in the degraded runs where the sync never completed; mirroring 6,000 entries to send one message was pure cost. - `scope` does NOT interpolate inputs, though trigger `paths` DO — an asymmetry the doc demonstrated on the trigger side without ever saying it does not hold for scope. Hence the constant, plus a test asserting scope and input agree. The two remaining broad examples are left broad, because both are agents that answer mentions anywhere and legitimately need the collection — but each now says why, so neither reads as the default. Also notes that `deploy` warns on these via `lintScopes()`. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * docs: correct two overstatements in the scope section Review caught both. "A write does not need the mirror — only the grant" is too strong, and §1 of this same skill says why: when the mirror is stuck rather than merely un-preloaded, the writeback cannot be acknowledged either — `ts: ''`, and the run is marked FAILED on the teardown flush. What was actually observed is narrower: the agent kept posting through runs that logged `scoped initial sync failed; continuing without preloaded reads`, where the mount was up and only the preload had been skipped. Reworded to say that, and to point out that the narrow scope fixes both cases because it is cheap enough to converge — which is the actual advice. Also drops the present tense on `lintScopes()`, which is not released yet (AgentWorkforce/workforce#311). Promising a warning that no vendored deploy emits would leave authors trusting a gate that isn't there. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * docs: teach the picker gate, not a hard-coded channel id The previous revision told authors to hoist the channel id into a constant and use it in `scope`. That works, but it is the worse of the two fixes and this skill should not be steering people to it: pinning an id takes the channel choice away from whoever deploys, and overriding the input then points the agent at a channel it has no write grant for. Cloud already supports the right answer. `persona-deploy.ts` (`pickerTargetPath`) rewrites a picker-gated collection scope down to the single record the deploy input resolves to, for reads and writebacks alike — so `/slack/channels/**` becomes `/slack/channels/<id>/**` while the operator keeps choosing the channel. Found while fixing the watchdog fleet: all eight personas already carried the `picker` and none carried `enabledByInput`, so the rewrite never fired and every deploy mirrored the whole channel tree. The failure mode is silent and the four requirements are easy to half-satisfy, so they are now listed explicitly, along with the note that missing any one falls back to mirroring everything. The constant remains documented as the fallback for an agent whose channel really is fixed rather than operator-chosen. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
1 participant
Why
scopedecides two things at once: which Relayfile paths the sandbox mirrors, and what the runtime token may touch. Both failure modes are silent. A scope the mount rejects mirrors nothing — reads come back empty, writebacks land on unmounted disk as no-ops, nothing throws, and the agent reports success having done nothing.This adds
lintScopes()alongside the existinglintTriggers(), on the same non-fatal warning channel: surfaced bydeploybefore any side effect, and returned onDeployResult.warnings.The rules
Six mirror cloud's authoritative
relayfile/mount-intent.ts, so anything flagged is something the mount would also reject:scope_not_absoluteslack/channels/**scope_trailing_slash/slack/channels/scope_mid_path_wildcard/slack/*/messagesscope_traversal_segment/slack/../linear/issues/**scope_emptyscope: {}scope_provider_root/slack/**The seventh is a judgment call and is the reason this exists.
scope_high_cardinality_rootThe mount is traversed at sandbox boot, so its size is paid on every run — but size is invisible in the glob.
/slack/channels/**is syntactically identical to/linear/issues/**.In one real workspace it was ~5,950 entries (2,008 files, 3,940 directories). It could not converge inside the mount budget, so runs came up degraded (
scoped initial sync failed; continuing without preloaded reads) and then failed outright with exit 124 once cloud began cancelling non-converging mounts at the hard deadline. Narrowing to the single channel the agent posted to took the same agent's bootstrap to a clean 127s — its first fully clean boot of the session.So
HIGH_CARDINALITY_ROOTSnames only the collections that grow with workspace history rather than with configuration:slack/channels,google-mail/messages,google-mail/threads.Two deliberate limits:
/**. Flagging every/linear/issues/**would be noise that trains authors to ignore the warning. A short explicit list is the honest version of a judgment that cannot be made statically.Verification
Run against real persona scopes:
persona-kit311 pass / 0 fail ·deploy251 pass / 0 fail · both typecheck clean.Scope of exposure
8 of the 9 personas in the watchdog fleet carry
/slack/channels/**, and 5 also carry/google-mail/{messages,threads}/**. They were surviving in degraded mode before cloud started cancelling non-converging mounts. This lint makes that visible at deploy; the companion docs change (skills→docs/scope-is-a-boot-cost) fixes the example they were all copied from.🤖 Generated with Claude Code