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Stable enum-shaped error key. Branch on this for recovery flows.

Set on 401s to distinguish token failure modes when finer detail is needed. token_revoked_post_claim is the post-#1284 surface for a chrm_app_* that was invalidated by a claim — the recovery field on the same error object carries the self-contained pairing-recovery hint the agent should follow instead of creating a new app.

Present on every plan refusal: the tier the caller was refused under. Its presence is what marks an error as a plan refusal rather than a validation or permission failure.

Which ceiling the call met, keyed by kind. A plan refusal (*_limit_exceeded) names the countable that ran out — version_history, routines_per_app, routines_per_owner, webhooks_per_app, webhooks_per_owner — and pairs it with max. An app_busy refusal names the bound it met and pairs it with observed and allowed; no plan lifts any of them. Two are per-app run bounds, concurrent_runs and runs_per_window; the third, render_token_refresh, is the page render asking for a new render-token secret, held by 10 per app per client IP and 60 per app across every address in a 60 second window, and observed/allowed name whichever of those two refused. An edits_too_large rejection carries the numeric cap that was exceeded instead of a name.

On an app_busy refusal, how hard the app's own refusal ladder is refusing: throttled is the plain ceiling breach above; parked means a caller kept calling inside a wait it was given, so the server mints its own Retry-After (doubling from 60s to a 300s cap) and refuses until a quiet window passes even once the ceiling clears; closed is the same, plus the response closes the connection. Absent on every other kind.

On a *_limit_exceeded refusal, that limit's number on the caller's plan.

On a plan_required refusal, the capability the plan does not include. Never paired with limit / max.

Absolute link to the owner's own billing page, where the refusal is lifted — the team's page for a team-owned app. Omitted only when the owner has no handle and therefore no settings page of their own, so treat it as optional and fall back to your own copy. MCP appends it as an Upgrade: <url> last line; the CLI prints it under the message.

Self-contained recovery hint, branching on kind. Attached to error envelopes the agent can self-correct on: pair for token_revoked_post_claim 401s (#1284), retry for 429s, shrink for too-large / quota-exceeded 413s, refetch for 412 revision_mismatch / invalid_if_match / 428 precondition_required, fix_route_label for 403 forbidden_write, rename for 409 manifest_id_immutable / manifest_id_conflict, and migrate_contract for 422 contract_migration_required. Every instructions string is a single-paragraph, action-first walk-through. Inlined per ADR 2026-05-06-agent-facing-error-surfaces-self-contain-the-fix.

Stable enum-shaped error key. Branch on this for recovery flows.

Set on 401s to distinguish token failure modes when finer detail is needed. token_revoked_post_claim is the post-#1284 surface for a chrm_app_* that was invalidated by a claim — the recovery field on the same error object carries the self-contained pairing-recovery hint the agent should follow instead of creating a new app.

Present on every plan refusal: the tier the caller was refused under. Its presence is what marks an error as a plan refusal rather than a validation or permission failure.

Which ceiling the call met, keyed by kind. A plan refusal (*_limit_exceeded) names the countable that ran out — version_history, routines_per_app, routines_per_owner, webhooks_per_app, webhooks_per_owner — and pairs it with max. An app_busy refusal names the bound it met and pairs it with observed and allowed; no plan lifts any of them. Two are per-app run bounds, concurrent_runs and runs_per_window; the third, render_token_refresh, is the page render asking for a new render-token secret, held by 10 per app per client IP and 60 per app across every address in a 60 second window, and observed/allowed name whichever of those two refused. An edits_too_large rejection carries the numeric cap that was exceeded instead of a name.

On an app_busy refusal, how hard the app's own refusal ladder is refusing: throttled is the plain ceiling breach above; parked means a caller kept calling inside a wait it was given, so the server mints its own Retry-After (doubling from 60s to a 300s cap) and refuses until a quiet window passes even once the ceiling clears; closed is the same, plus the response closes the connection. Absent on every other kind.

On a *_limit_exceeded refusal, that limit's number on the caller's plan.

On a plan_required refusal, the capability the plan does not include. Never paired with limit / max.

Absolute link to the owner's own billing page, where the refusal is lifted — the team's page for a team-owned app. Omitted only when the owner has no handle and therefore no settings page of their own, so treat it as optional and fall back to your own copy. MCP appends it as an Upgrade: <url> last line; the CLI prints it under the message.

Self-contained recovery hint, branching on kind. Attached to error envelopes the agent can self-correct on: pair for token_revoked_post_claim 401s (#1284), retry for 429s, shrink for too-large / quota-exceeded 413s, refetch for 412 revision_mismatch / invalid_if_match / 428 precondition_required, fix_route_label for 403 forbidden_write, rename for 409 manifest_id_immutable / manifest_id_conflict, and migrate_contract for 422 contract_migration_required. Every instructions string is a single-paragraph, action-first walk-through. Inlined per ADR 2026-05-06-agent-facing-error-surfaces-self-contain-the-fix.

Stable enum-shaped error key. Branch on this for recovery flows.

Set on 401s to distinguish token failure modes when finer detail is needed. token_revoked_post_claim is the post-#1284 surface for a chrm_app_* that was invalidated by a claim — the recovery field on the same error object carries the self-contained pairing-recovery hint the agent should follow instead of creating a new app.

Present on every plan refusal: the tier the caller was refused under. Its presence is what marks an error as a plan refusal rather than a validation or permission failure.

Which ceiling the call met, keyed by kind. A plan refusal (*_limit_exceeded) names the countable that ran out — version_history, routines_per_app, routines_per_owner, webhooks_per_app, webhooks_per_owner — and pairs it with max. An app_busy refusal names the bound it met and pairs it with observed and allowed; no plan lifts any of them. Two are per-app run bounds, concurrent_runs and runs_per_window; the third, render_token_refresh, is the page render asking for a new render-token secret, held by 10 per app per client IP and 60 per app across every address in a 60 second window, and observed/allowed name whichever of those two refused. An edits_too_large rejection carries the numeric cap that was exceeded instead of a name.

On an app_busy refusal, how hard the app's own refusal ladder is refusing: throttled is the plain ceiling breach above; parked means a caller kept calling inside a wait it was given, so the server mints its own Retry-After (doubling from 60s to a 300s cap) and refuses until a quiet window passes even once the ceiling clears; closed is the same, plus the response closes the connection. Absent on every other kind.

On a *_limit_exceeded refusal, that limit's number on the caller's plan.

On a plan_required refusal, the capability the plan does not include. Never paired with limit / max.

Absolute link to the owner's own billing page, where the refusal is lifted — the team's page for a team-owned app. Omitted only when the owner has no handle and therefore no settings page of their own, so treat it as optional and fall back to your own copy. MCP appends it as an Upgrade: <url> last line; the CLI prints it under the message.

Self-contained recovery hint, branching on kind. Attached to error envelopes the agent can self-correct on: pair for token_revoked_post_claim 401s (#1284), retry for 429s, shrink for too-large / quota-exceeded 413s, refetch for 412 revision_mismatch / invalid_if_match / 428 precondition_required, fix_route_label for 403 forbidden_write, rename for 409 manifest_id_immutable / manifest_id_conflict, and migrate_contract for 422 contract_migration_required. Every instructions string is a single-paragraph, action-first walk-through. Inlined per ADR 2026-05-06-agent-facing-error-surfaces-self-contain-the-fix.

Stable enum-shaped error key. Branch on this for recovery flows.

Set on 401s to distinguish token failure modes when finer detail is needed. token_revoked_post_claim is the post-#1284 surface for a chrm_app_* that was invalidated by a claim — the recovery field on the same error object carries the self-contained pairing-recovery hint the agent should follow instead of creating a new app.

Present on every plan refusal: the tier the caller was refused under. Its presence is what marks an error as a plan refusal rather than a validation or permission failure.

Which ceiling the call met, keyed by kind. A plan refusal (*_limit_exceeded) names the countable that ran out — version_history, routines_per_app, routines_per_owner, webhooks_per_app, webhooks_per_owner — and pairs it with max. An app_busy refusal names the bound it met and pairs it with observed and allowed; no plan lifts any of them. Two are per-app run bounds, concurrent_runs and runs_per_window; the third, render_token_refresh, is the page render asking for a new render-token secret, held by 10 per app per client IP and 60 per app across every address in a 60 second window, and observed/allowed name whichever of those two refused. An edits_too_large rejection carries the numeric cap that was exceeded instead of a name.

On an app_busy refusal, how hard the app's own refusal ladder is refusing: throttled is the plain ceiling breach above; parked means a caller kept calling inside a wait it was given, so the server mints its own Retry-After (doubling from 60s to a 300s cap) and refuses until a quiet window passes even once the ceiling clears; closed is the same, plus the response closes the connection. Absent on every other kind.

On a *_limit_exceeded refusal, that limit's number on the caller's plan.

On a plan_required refusal, the capability the plan does not include. Never paired with limit / max.

Absolute link to the owner's own billing page, where the refusal is lifted — the team's page for a team-owned app. Omitted only when the owner has no handle and therefore no settings page of their own, so treat it as optional and fall back to your own copy. MCP appends it as an Upgrade: <url> last line; the CLI prints it under the message.

Self-contained recovery hint, branching on kind. Attached to error envelopes the agent can self-correct on: pair for token_revoked_post_claim 401s (#1284), retry for 429s, shrink for too-large / quota-exceeded 413s, refetch for 412 revision_mismatch / invalid_if_match / 428 precondition_required, fix_route_label for 403 forbidden_write, rename for 409 manifest_id_immutable / manifest_id_conflict, and migrate_contract for 422 contract_migration_required. Every instructions string is a single-paragraph, action-first walk-through. Inlined per ADR 2026-05-06-agent-facing-error-surfaces-self-contain-the-fix.

Stable enum-shaped error key. Branch on this for recovery flows.

Set on 401s to distinguish token failure modes when finer detail is needed. token_revoked_post_claim is the post-#1284 surface for a chrm_app_* that was invalidated by a claim — the recovery field on the same error object carries the self-contained pairing-recovery hint the agent should follow instead of creating a new app.

Present on every plan refusal: the tier the caller was refused under. Its presence is what marks an error as a plan refusal rather than a validation or permission failure.

Which ceiling the call met, keyed by kind. A plan refusal (*_limit_exceeded) names the countable that ran out — version_history, routines_per_app, routines_per_owner, webhooks_per_app, webhooks_per_owner — and pairs it with max. An app_busy refusal names the bound it met and pairs it with observed and allowed; no plan lifts any of them. Two are per-app run bounds, concurrent_runs and runs_per_window; the third, render_token_refresh, is the page render asking for a new render-token secret, held by 10 per app per client IP and 60 per app across every address in a 60 second window, and observed/allowed name whichever of those two refused. An edits_too_large rejection carries the numeric cap that was exceeded instead of a name.

On an app_busy refusal, how hard the app's own refusal ladder is refusing: throttled is the plain ceiling breach above; parked means a caller kept calling inside a wait it was given, so the server mints its own Retry-After (doubling from 60s to a 300s cap) and refuses until a quiet window passes even once the ceiling clears; closed is the same, plus the response closes the connection. Absent on every other kind.

On a *_limit_exceeded refusal, that limit's number on the caller's plan.

On a plan_required refusal, the capability the plan does not include. Never paired with limit / max.

Absolute link to the owner's own billing page, where the refusal is lifted — the team's page for a team-owned app. Omitted only when the owner has no handle and therefore no settings page of their own, so treat it as optional and fall back to your own copy. MCP appends it as an Upgrade: <url> last line; the CLI prints it under the message.

Self-contained recovery hint, branching on kind. Attached to error envelopes the agent can self-correct on: pair for token_revoked_post_claim 401s (#1284), retry for 429s, shrink for too-large / quota-exceeded 413s, refetch for 412 revision_mismatch / invalid_if_match / 428 precondition_required, fix_route_label for 403 forbidden_write, rename for 409 manifest_id_immutable / manifest_id_conflict, and migrate_contract for 422 contract_migration_required. Every instructions string is a single-paragraph, action-first walk-through. Inlined per ADR 2026-05-06-agent-facing-error-surfaces-self-contain-the-fix.