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feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off - #1760

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feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off#1760
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feat/agent-chat-daily-quota

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Why

ADR-0040 §5's perception rule: limits that can only manifest as refusal (quota exhausted) must be honest at the moment of impact — why, when it recovers, the way out — and must never degrade silently. This PR ships the mechanism for daily AI usage quotas; the policy (free/pro tier numbers) stays in deployment config and later plan entitlements. Companion to cloud#242 (blueprint scope cap) — together they are Phase 2a of the tiering plan.

What

  • AgentChatQuota hook on buildAgentRoutes(…, {quota}): check() before each user turn, consume() exactly once when admitted (per turn — not per tool call, not per token). No quota wired → byte-identical behavior.
  • Honest refusal, both modes: stream mode returns the copy as a normal assistant message through encodeVercelDataStream (zero client changes, chat never shows a raw error); JSON mode returns 429 with stable code: 'ai_quota_exhausted' + resetAt.
  • DailyMessageQuota: N user turns / user / environment / UTC day, persisted in the new ai_usage_daily platform object via IDataEngine (survives restarts, shared across instances). Fail-open on counter errors — a broken counter must never take chat down. Explicitly documented as an entitlement gate, not billing-grade metering.
  • Opt-in wiring: AI_DAILY_USER_MESSAGES=<N> env var; unset/invalid → quota disabled (logged).

Tests

  • 10 new tests: under/at limit, honest copy (why+when+way-out), insert-then-increment, fail-open, per-env/per-user scoping, route pass-through + consume-once, 429 envelope, streamed refusal framing, no-quota baseline, environmentId forwarding.
  • service-ai suite 344/345 in the worktree — the one failure (embedder binding) fails on the unmodified baseline in the same worktree (env-only, verified via git stash) and passes in the main checkout; CI is the arbiter.

Follow-ups

  • Plan-tier AgentChatQuota implementation (free/pro) once pricing tiers are decided — plugs into this gate unchanged.
  • Optional remaining surfacing in the chat UI (progressive disclosure only near the limit).

🤖 Generated with Claude Code

@os-zhuang@claude
feat(service-ai): optional per-turn daily chat quota on the agent cha…
f883ad3
…t route (ADR-0040 §5)
Mechanism only, default OFF — no behavior change unless a deployment sets
AI_DAILY_USER_MESSAGES=<N>:
- AgentChatQuota hook on buildAgentRoutes: checked before each user turn,
consumed exactly once when admitted (per turn, not per tool call).
- Refusal is honest at the moment of impact (perception rule): streaming
clients receive the copy as a normal assistant message (no client change,
no raw transport error); JSON clients get 429 + code 'ai_quota_exhausted'
+ resetAt.
- DailyMessageQuota: N user turns / user / environment / UTC day, backed by
the new ai_usage_daily platform object via IDataEngine. Counter semantics
(lost update under-counts one turn) — entitlement gate, not billing.
Fail-open on store errors: a broken counter never takes chat down.
- Plan-tier policies (free vs pro) later implement AgentChatQuota and plug
into the same gate; route and counter unchanged.
10 new tests (quota policy + route gate, both modes, env scoping, fail-open).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off by os-zhuang · Pull Request #1760 · objectstack-ai/objectstack · GitHub
Skip to content
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off - #1760
Merged
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Jun 12, 2026
Merged
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off#1760
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
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@os-zhuangos-zhuang
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Jun 12, 2026

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Why
ADR-0040 §5's perception rule: limits that can only manifest as refusal (quota exhausted) must be honest at the moment of impact — why, when it recovers, the way out — and must never degrade silently. This PR ships the mechanism for daily AI usage quotas; the policy (free/pro tier numbers) stays in deployment config and later plan entitlements. Companion to cloud#242 (blueprint scope cap) — together they are Phase 2a of the tiering plan.
What
  • AgentChatQuota hook on buildAgentRoutes(…, {quota}): check() before each user turn, consume() exactly once when admitted (per turn — not per tool call, not per token). No quota wired → byte-identical behavior.
  • Honest refusal, both modes: stream mode returns the copy as a normal assistant message through encodeVercelDataStream (zero client changes, chat never shows a raw error); JSON mode returns 429 with stable code: 'ai_quota_exhausted' + resetAt.
  • DailyMessageQuota: N user turns / user / environment / UTC day, persisted in the new ai_usage_daily platform object via IDataEngine (survives restarts, shared across instances). Fail-open on counter errors — a broken counter must never take chat down. Explicitly documented as an entitlement gate, not billing-grade metering.
  • Opt-in wiring: AI_DAILY_USER_MESSAGES=<N> env var; unset/invalid → quota disabled (logged).
Tests
  • 10 new tests: under/at limit, honest copy (why+when+way-out), insert-then-increment, fail-open, per-env/per-user scoping, route pass-through + consume-once, 429 envelope, streamed refusal framing, no-quota baseline, environmentId forwarding.
  • service-ai suite 344/345 in the worktree — the one failure (embedder binding) fails on the unmodified baseline in the same worktree (env-only, verified via git stash) and passes in the main checkout; CI is the arbiter.
Follow-ups
  • Plan-tier AgentChatQuota implementation (free/pro) once pricing tiers are decided — plugs into this gate unchanged.
  • Optional remaining surfacing in the chat UI (progressive disclosure only near the limit).
🤖 Generated with Claude Code
@os-zhuang@claude
feat(service-ai): optional per-turn daily chat quota on the agent cha…
f883ad3
…t route (ADR-0040 §5)
Mechanism only, default OFF — no behavior change unless a deployment sets
AI_DAILY_USER_MESSAGES=<N>:
- AgentChatQuota hook on buildAgentRoutes: checked before each user turn,
consumed exactly once when admitted (per turn, not per tool call).
- Refusal is honest at the moment of impact (perception rule): streaming
clients receive the copy as a normal assistant message (no client change,
no raw transport error); JSON clients get 429 + code 'ai_quota_exhausted'
+ resetAt.
- DailyMessageQuota: N user turns / user / environment / UTC day, backed by
the new ai_usage_daily platform object via IDataEngine. Counter semantics
(lost update under-counts one turn) — entitlement gate, not billing.
Fail-open on store errors: a broken counter never takes chat down.
- Plan-tier policies (free vs pro) later implement AgentChatQuota and plug
into the same gate; route and counter unchanged.
10 new tests (quota policy + route gate, both modes, env scoping, fail-open).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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merged commit 57abe7a
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deleted the

feat/agent-chat-daily-quota

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June 12, 2026 03:27
@baozhoutaobaozhoutao
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Aug 30, 2026

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, 'i');
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feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off by os-zhuang · Pull Request #1760 · objectstack-ai/objectstack · GitHub
Skip to content
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off - #1760
Merged
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Jun 12, 2026
Merged
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off#1760
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Conversation
@os-zhuang
@os-zhuangos-zhuang
commented
Jun 12, 2026

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Why
ADR-0040 §5's perception rule: limits that can only manifest as refusal (quota exhausted) must be honest at the moment of impact — why, when it recovers, the way out — and must never degrade silently. This PR ships the mechanism for daily AI usage quotas; the policy (free/pro tier numbers) stays in deployment config and later plan entitlements. Companion to cloud#242 (blueprint scope cap) — together they are Phase 2a of the tiering plan.
What
  • AgentChatQuota hook on buildAgentRoutes(…, {quota}): check() before each user turn, consume() exactly once when admitted (per turn — not per tool call, not per token). No quota wired → byte-identical behavior.
  • Honest refusal, both modes: stream mode returns the copy as a normal assistant message through encodeVercelDataStream (zero client changes, chat never shows a raw error); JSON mode returns 429 with stable code: 'ai_quota_exhausted' + resetAt.
  • DailyMessageQuota: N user turns / user / environment / UTC day, persisted in the new ai_usage_daily platform object via IDataEngine (survives restarts, shared across instances). Fail-open on counter errors — a broken counter must never take chat down. Explicitly documented as an entitlement gate, not billing-grade metering.
  • Opt-in wiring: AI_DAILY_USER_MESSAGES=<N> env var; unset/invalid → quota disabled (logged).
Tests
  • 10 new tests: under/at limit, honest copy (why+when+way-out), insert-then-increment, fail-open, per-env/per-user scoping, route pass-through + consume-once, 429 envelope, streamed refusal framing, no-quota baseline, environmentId forwarding.
  • service-ai suite 344/345 in the worktree — the one failure (embedder binding) fails on the unmodified baseline in the same worktree (env-only, verified via git stash) and passes in the main checkout; CI is the arbiter.
Follow-ups
  • Plan-tier AgentChatQuota implementation (free/pro) once pricing tiers are decided — plugs into this gate unchanged.
  • Optional remaining surfacing in the chat UI (progressive disclosure only near the limit).
🤖 Generated with Claude Code
@os-zhuang@claude
feat(service-ai): optional per-turn daily chat quota on the agent cha…
f883ad3
…t route (ADR-0040 §5)
Mechanism only, default OFF — no behavior change unless a deployment sets
AI_DAILY_USER_MESSAGES=<N>:
- AgentChatQuota hook on buildAgentRoutes: checked before each user turn,
consumed exactly once when admitted (per turn, not per tool call).
- Refusal is honest at the moment of impact (perception rule): streaming
clients receive the copy as a normal assistant message (no client change,
no raw transport error); JSON clients get 429 + code 'ai_quota_exhausted'
+ resetAt.
- DailyMessageQuota: N user turns / user / environment / UTC day, backed by
the new ai_usage_daily platform object via IDataEngine. Counter semantics
(lost update under-counts one turn) — entitlement gate, not billing.
Fail-open on store errors: a broken counter never takes chat down.
- Plan-tier policies (free vs pro) later implement AgentChatQuota and plug
into the same gate; route and counter unchanged.
10 new tests (quota policy + route gate, both modes, env scoping, fail-open).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
@vercel
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merged commit 57abe7a
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@os-zhuang
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deleted the

feat/agent-chat-daily-quota

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June 12, 2026 03:27
@baozhoutaobaozhoutao
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Aug 30, 2026

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feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off by os-zhuang · Pull Request #1760 · objectstack-ai/objectstack · GitHub
Skip to content
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off - #1760
Merged
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Jun 12, 2026
Merged
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off#1760
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
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Jun 12, 2026

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Why
ADR-0040 §5's perception rule: limits that can only manifest as refusal (quota exhausted) must be honest at the moment of impact — why, when it recovers, the way out — and must never degrade silently. This PR ships the mechanism for daily AI usage quotas; the policy (free/pro tier numbers) stays in deployment config and later plan entitlements. Companion to cloud#242 (blueprint scope cap) — together they are Phase 2a of the tiering plan.
What
  • AgentChatQuota hook on buildAgentRoutes(…, {quota}): check() before each user turn, consume() exactly once when admitted (per turn — not per tool call, not per token). No quota wired → byte-identical behavior.
  • Honest refusal, both modes: stream mode returns the copy as a normal assistant message through encodeVercelDataStream (zero client changes, chat never shows a raw error); JSON mode returns 429 with stable code: 'ai_quota_exhausted' + resetAt.
  • DailyMessageQuota: N user turns / user / environment / UTC day, persisted in the new ai_usage_daily platform object via IDataEngine (survives restarts, shared across instances). Fail-open on counter errors — a broken counter must never take chat down. Explicitly documented as an entitlement gate, not billing-grade metering.
  • Opt-in wiring: AI_DAILY_USER_MESSAGES=<N> env var; unset/invalid → quota disabled (logged).
Tests
  • 10 new tests: under/at limit, honest copy (why+when+way-out), insert-then-increment, fail-open, per-env/per-user scoping, route pass-through + consume-once, 429 envelope, streamed refusal framing, no-quota baseline, environmentId forwarding.
  • service-ai suite 344/345 in the worktree — the one failure (embedder binding) fails on the unmodified baseline in the same worktree (env-only, verified via git stash) and passes in the main checkout; CI is the arbiter.
Follow-ups
  • Plan-tier AgentChatQuota implementation (free/pro) once pricing tiers are decided — plugs into this gate unchanged.
  • Optional remaining surfacing in the chat UI (progressive disclosure only near the limit).
🤖 Generated with Claude Code
@os-zhuang@claude
feat(service-ai): optional per-turn daily chat quota on the agent cha…
f883ad3
…t route (ADR-0040 §5)
Mechanism only, default OFF — no behavior change unless a deployment sets
AI_DAILY_USER_MESSAGES=<N>:
- AgentChatQuota hook on buildAgentRoutes: checked before each user turn,
consumed exactly once when admitted (per turn, not per tool call).
- Refusal is honest at the moment of impact (perception rule): streaming
clients receive the copy as a normal assistant message (no client change,
no raw transport error); JSON clients get 429 + code 'ai_quota_exhausted'
+ resetAt.
- DailyMessageQuota: N user turns / user / environment / UTC day, backed by
the new ai_usage_daily platform object via IDataEngine. Counter semantics
(lost update under-counts one turn) — entitlement gate, not billing.
Fail-open on store errors: a broken counter never takes chat down.
- Plan-tier policies (free vs pro) later implement AgentChatQuota and plug
into the same gate; route and counter unchanged.
10 new tests (quota policy + route gate, both modes, env scoping, fail-open).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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@os-zhuang
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deleted the

feat/agent-chat-daily-quota

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June 12, 2026 03:27
@baozhoutaobaozhoutao
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feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off by os-zhuang · Pull Request #1760 · objectstack-ai/objectstack · GitHub
Skip to content
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off - #1760
Merged
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Jun 12, 2026
Merged
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off#1760
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Conversation
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@os-zhuangos-zhuang
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Why
ADR-0040 §5's perception rule: limits that can only manifest as refusal (quota exhausted) must be honest at the moment of impact — why, when it recovers, the way out — and must never degrade silently. This PR ships the mechanism for daily AI usage quotas; the policy (free/pro tier numbers) stays in deployment config and later plan entitlements. Companion to cloud#242 (blueprint scope cap) — together they are Phase 2a of the tiering plan.
What
  • AgentChatQuota hook on buildAgentRoutes(…, {quota}): check() before each user turn, consume() exactly once when admitted (per turn — not per tool call, not per token). No quota wired → byte-identical behavior.
  • Honest refusal, both modes: stream mode returns the copy as a normal assistant message through encodeVercelDataStream (zero client changes, chat never shows a raw error); JSON mode returns 429 with stable code: 'ai_quota_exhausted' + resetAt.
  • DailyMessageQuota: N user turns / user / environment / UTC day, persisted in the new ai_usage_daily platform object via IDataEngine (survives restarts, shared across instances). Fail-open on counter errors — a broken counter must never take chat down. Explicitly documented as an entitlement gate, not billing-grade metering.
  • Opt-in wiring: AI_DAILY_USER_MESSAGES=<N> env var; unset/invalid → quota disabled (logged).
Tests
  • 10 new tests: under/at limit, honest copy (why+when+way-out), insert-then-increment, fail-open, per-env/per-user scoping, route pass-through + consume-once, 429 envelope, streamed refusal framing, no-quota baseline, environmentId forwarding.
  • service-ai suite 344/345 in the worktree — the one failure (embedder binding) fails on the unmodified baseline in the same worktree (env-only, verified via git stash) and passes in the main checkout; CI is the arbiter.
Follow-ups
  • Plan-tier AgentChatQuota implementation (free/pro) once pricing tiers are decided — plugs into this gate unchanged.
  • Optional remaining surfacing in the chat UI (progressive disclosure only near the limit).
🤖 Generated with Claude Code
@os-zhuang@claude
feat(service-ai): optional per-turn daily chat quota on the agent cha…
f883ad3
…t route (ADR-0040 §5)
Mechanism only, default OFF — no behavior change unless a deployment sets
AI_DAILY_USER_MESSAGES=<N>:
- AgentChatQuota hook on buildAgentRoutes: checked before each user turn,
consumed exactly once when admitted (per turn, not per tool call).
- Refusal is honest at the moment of impact (perception rule): streaming
clients receive the copy as a normal assistant message (no client change,
no raw transport error); JSON clients get 429 + code 'ai_quota_exhausted'
+ resetAt.
- DailyMessageQuota: N user turns / user / environment / UTC day, backed by
the new ai_usage_daily platform object via IDataEngine. Counter semantics
(lost update under-counts one turn) — entitlement gate, not billing.
Fail-open on store errors: a broken counter never takes chat down.
- Plan-tier policies (free vs pro) later implement AgentChatQuota and plug
into the same gate; route and counter unchanged.
10 new tests (quota policy + route gate, both modes, env scoping, fail-open).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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function tryTheater() {
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off by os-zhuang · Pull Request #1760 · objectstack-ai/objectstack · GitHub
Skip to content
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off - #1760
Merged
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Jun 12, 2026
Merged
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off#1760
os-zhuang merged 1 commit into
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feat/agent-chat-daily-quota
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@os-zhuangos-zhuang
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Jun 12, 2026

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Why
ADR-0040 §5's perception rule: limits that can only manifest as refusal (quota exhausted) must be honest at the moment of impact — why, when it recovers, the way out — and must never degrade silently. This PR ships the mechanism for daily AI usage quotas; the policy (free/pro tier numbers) stays in deployment config and later plan entitlements. Companion to cloud#242 (blueprint scope cap) — together they are Phase 2a of the tiering plan.
What
  • AgentChatQuota hook on buildAgentRoutes(…, {quota}): check() before each user turn, consume() exactly once when admitted (per turn — not per tool call, not per token). No quota wired → byte-identical behavior.
  • Honest refusal, both modes: stream mode returns the copy as a normal assistant message through encodeVercelDataStream (zero client changes, chat never shows a raw error); JSON mode returns 429 with stable code: 'ai_quota_exhausted' + resetAt.
  • DailyMessageQuota: N user turns / user / environment / UTC day, persisted in the new ai_usage_daily platform object via IDataEngine (survives restarts, shared across instances). Fail-open on counter errors — a broken counter must never take chat down. Explicitly documented as an entitlement gate, not billing-grade metering.
  • Opt-in wiring: AI_DAILY_USER_MESSAGES=<N> env var; unset/invalid → quota disabled (logged).
Tests
  • 10 new tests: under/at limit, honest copy (why+when+way-out), insert-then-increment, fail-open, per-env/per-user scoping, route pass-through + consume-once, 429 envelope, streamed refusal framing, no-quota baseline, environmentId forwarding.
  • service-ai suite 344/345 in the worktree — the one failure (embedder binding) fails on the unmodified baseline in the same worktree (env-only, verified via git stash) and passes in the main checkout; CI is the arbiter.
Follow-ups
  • Plan-tier AgentChatQuota implementation (free/pro) once pricing tiers are decided — plugs into this gate unchanged.
  • Optional remaining surfacing in the chat UI (progressive disclosure only near the limit).
🤖 Generated with Claude Code
@os-zhuang@claude
feat(service-ai): optional per-turn daily chat quota on the agent cha…
f883ad3
…t route (ADR-0040 §5)
Mechanism only, default OFF — no behavior change unless a deployment sets
AI_DAILY_USER_MESSAGES=<N>:
- AgentChatQuota hook on buildAgentRoutes: checked before each user turn,
consumed exactly once when admitted (per turn, not per tool call).
- Refusal is honest at the moment of impact (perception rule): streaming
clients receive the copy as a normal assistant message (no client change,
no raw transport error); JSON clients get 429 + code 'ai_quota_exhausted'
+ resetAt.
- DailyMessageQuota: N user turns / user / environment / UTC day, backed by
the new ai_usage_daily platform object via IDataEngine. Counter semantics
(lost update under-counts one turn) — entitlement gate, not billing.
Fail-open on store errors: a broken counter never takes chat down.
- Plan-tier policies (free vs pro) later implement AgentChatQuota and plug
into the same gate; route and counter unchanged.
10 new tests (quota policy + route gate, both modes, env scoping, fail-open).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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deleted the

feat/agent-chat-daily-quota

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June 12, 2026 03:27
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Aug 30, 2026

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off by os-zhuang · Pull Request #1760 · objectstack-ai/objectstack · GitHub
Skip to content
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off - #1760
Merged
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Jun 12, 2026
Merged
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off#1760
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Conversation
@os-zhuang
@os-zhuangos-zhuang
commented
Jun 12, 2026

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Contributor
Why
ADR-0040 §5's perception rule: limits that can only manifest as refusal (quota exhausted) must be honest at the moment of impact — why, when it recovers, the way out — and must never degrade silently. This PR ships the mechanism for daily AI usage quotas; the policy (free/pro tier numbers) stays in deployment config and later plan entitlements. Companion to cloud#242 (blueprint scope cap) — together they are Phase 2a of the tiering plan.
What
  • AgentChatQuota hook on buildAgentRoutes(…, {quota}): check() before each user turn, consume() exactly once when admitted (per turn — not per tool call, not per token). No quota wired → byte-identical behavior.
  • Honest refusal, both modes: stream mode returns the copy as a normal assistant message through encodeVercelDataStream (zero client changes, chat never shows a raw error); JSON mode returns 429 with stable code: 'ai_quota_exhausted' + resetAt.
  • DailyMessageQuota: N user turns / user / environment / UTC day, persisted in the new ai_usage_daily platform object via IDataEngine (survives restarts, shared across instances). Fail-open on counter errors — a broken counter must never take chat down. Explicitly documented as an entitlement gate, not billing-grade metering.
  • Opt-in wiring: AI_DAILY_USER_MESSAGES=<N> env var; unset/invalid → quota disabled (logged).
Tests
  • 10 new tests: under/at limit, honest copy (why+when+way-out), insert-then-increment, fail-open, per-env/per-user scoping, route pass-through + consume-once, 429 envelope, streamed refusal framing, no-quota baseline, environmentId forwarding.
  • service-ai suite 344/345 in the worktree — the one failure (embedder binding) fails on the unmodified baseline in the same worktree (env-only, verified via git stash) and passes in the main checkout; CI is the arbiter.
Follow-ups
  • Plan-tier AgentChatQuota implementation (free/pro) once pricing tiers are decided — plugs into this gate unchanged.
  • Optional remaining surfacing in the chat UI (progressive disclosure only near the limit).
🤖 Generated with Claude Code
@os-zhuang@claude
feat(service-ai): optional per-turn daily chat quota on the agent cha…
f883ad3
…t route (ADR-0040 §5)
Mechanism only, default OFF — no behavior change unless a deployment sets
AI_DAILY_USER_MESSAGES=<N>:
- AgentChatQuota hook on buildAgentRoutes: checked before each user turn,
consumed exactly once when admitted (per turn, not per tool call).
- Refusal is honest at the moment of impact (perception rule): streaming
clients receive the copy as a normal assistant message (no client change,
no raw transport error); JSON clients get 429 + code 'ai_quota_exhausted'
+ resetAt.
- DailyMessageQuota: N user turns / user / environment / UTC day, backed by
the new ai_usage_daily platform object via IDataEngine. Counter semantics
(lost update under-counts one turn) — entitlement gate, not billing.
Fail-open on store errors: a broken counter never takes chat down.
- Plan-tier policies (free vs pro) later implement AgentChatQuota and plug
into the same gate; route and counter unchanged.
10 new tests (quota policy + route gate, both modes, env scoping, fail-open).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
@vercel
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Jun 12, 2026•

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ProjectDeploymentActionsUpdated (UTC)
specReadyReadyPreview, CommentJun 12, 2026 3:27am
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@os-zhuang
os-zhuang
merged commit 57abe7a
into
mainJun 12, 2026

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@os-zhuang
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deleted the

feat/agent-chat-daily-quota

branch
June 12, 2026 03:27
@baozhoutaobaozhoutao
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Aug 30, 2026

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
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var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
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filter: invert(1) hue-rotate(180deg) !important;
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feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off by os-zhuang · Pull Request #1760 · objectstack-ai/objectstack · GitHub
Skip to content
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off - #1760
Merged
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Jun 12, 2026
Merged
feat(service-ai): optional per-turn daily chat quota (ADR-0040 §5) — default off#1760
os-zhuang merged 1 commit into
mainfrom 
feat/agent-chat-daily-quota
Conversation
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@os-zhuangos-zhuang
commented
Jun 12, 2026

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Contributor
Why
ADR-0040 §5's perception rule: limits that can only manifest as refusal (quota exhausted) must be honest at the moment of impact — why, when it recovers, the way out — and must never degrade silently. This PR ships the mechanism for daily AI usage quotas; the policy (free/pro tier numbers) stays in deployment config and later plan entitlements. Companion to cloud#242 (blueprint scope cap) — together they are Phase 2a of the tiering plan.
What
  • AgentChatQuota hook on buildAgentRoutes(…, {quota}): check() before each user turn, consume() exactly once when admitted (per turn — not per tool call, not per token). No quota wired → byte-identical behavior.
  • Honest refusal, both modes: stream mode returns the copy as a normal assistant message through encodeVercelDataStream (zero client changes, chat never shows a raw error); JSON mode returns 429 with stable code: 'ai_quota_exhausted' + resetAt.
  • DailyMessageQuota: N user turns / user / environment / UTC day, persisted in the new ai_usage_daily platform object via IDataEngine (survives restarts, shared across instances). Fail-open on counter errors — a broken counter must never take chat down. Explicitly documented as an entitlement gate, not billing-grade metering.
  • Opt-in wiring: AI_DAILY_USER_MESSAGES=<N> env var; unset/invalid → quota disabled (logged).
Tests
  • 10 new tests: under/at limit, honest copy (why+when+way-out), insert-then-increment, fail-open, per-env/per-user scoping, route pass-through + consume-once, 429 envelope, streamed refusal framing, no-quota baseline, environmentId forwarding.
  • service-ai suite 344/345 in the worktree — the one failure (embedder binding) fails on the unmodified baseline in the same worktree (env-only, verified via git stash) and passes in the main checkout; CI is the arbiter.
Follow-ups
  • Plan-tier AgentChatQuota implementation (free/pro) once pricing tiers are decided — plugs into this gate unchanged.
  • Optional remaining surfacing in the chat UI (progressive disclosure only near the limit).
🤖 Generated with Claude Code
@os-zhuang@claude
feat(service-ai): optional per-turn daily chat quota on the agent cha…
f883ad3
…t route (ADR-0040 §5)
Mechanism only, default OFF — no behavior change unless a deployment sets
AI_DAILY_USER_MESSAGES=<N>:
- AgentChatQuota hook on buildAgentRoutes: checked before each user turn,
consumed exactly once when admitted (per turn, not per tool call).
- Refusal is honest at the moment of impact (perception rule): streaming
clients receive the copy as a normal assistant message (no client change,
no raw transport error); JSON clients get 429 + code 'ai_quota_exhausted'
+ resetAt.
- DailyMessageQuota: N user turns / user / environment / UTC day, backed by
the new ai_usage_daily platform object via IDataEngine. Counter semantics
(lost update under-counts one turn) — entitlement gate, not billing.
Fail-open on store errors: a broken counter never takes chat down.
- Plan-tier policies (free vs pro) later implement AgentChatQuota and plug
into the same gate; route and counter unchanged.
10 new tests (quota policy + route gate, both modes, env scoping, fail-open).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
@vercel
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Jun 12, 2026•

edited

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ProjectDeploymentActionsUpdated (UTC)
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merged commit 57abe7a
into
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12 checks passed

@os-zhuang
os-zhuang
deleted the

feat/agent-chat-daily-quota

branch
June 12, 2026 03:27
@baozhoutaobaozhoutao
mentioned this pull request
Aug 30, 2026

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