feat(server): stamp maxTokens into OpenCode's token-usage snapshot#47

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Merged
buluma merged 2 commits into from
Sep 2, 2026
Merged

feat(server): stamp maxTokens into OpenCode's token-usage snapshot #47

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9b60e97
feat(server): stamp maxTokens into OpenCode's token-usage snapshot
buluma Sep 2, 2026
84c8f4a
fix(server): omit maxTokens when rounding a fractional cap produces zero
buluma Sep 2, 2026
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79 changes: 79 additions & 0 deletions apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -1104,6 +1104,85 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
} as AssistantMessage),
undefined,
);

const limits = new Map([
["openai/gpt-5", 200_000],
["anthropic/claude-sonnet-5", 1_000_000],
]);

// A matching provider/model key stamps maxTokens into the snapshot.
NodeAssert.deepEqual(
openCodeTokenUsageSnapshot(
{
...baseInfo,
cost: 0.0042,
tokens: { input: 100, output: 40, reasoning: 10, cache: { read: 5, write: 0 } },
} as AssistantMessage,
limits,
),
{
usedTokens: 150,
inputTokens: 100,
outputTokens: 40,
reasoningOutputTokens: 10,
cachedInputTokens: 5,
maxTokens: 200_000,
},
);

// Unknown provider/model -- no maxTokens even though the map has other entries.
NodeAssert.deepEqual(
openCodeTokenUsageSnapshot(
{
...baseInfo,
modelID: "gpt-5-mini",
cost: 0,
tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
} as AssistantMessage,
limits,
),
{ usedTokens: 1, inputTokens: 1 },
);

// Zero/negative entries in the map are ignored -- the schema field is a PositiveInt.
NodeAssert.deepEqual(
openCodeTokenUsageSnapshot(
{
...baseInfo,
cost: 0,
tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
} as AssistantMessage,
new Map([["openai/gpt-5", 0]]),
),
{ usedTokens: 1, inputTokens: 1 },
);

// A sub-1 fractional cap rounds to 0, which would violate the
// PositiveInt schema field -- must be omitted, not emitted as 0.
NodeAssert.deepEqual(
openCodeTokenUsageSnapshot(
{
...baseInfo,
cost: 0,
tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
} as AssistantMessage,
new Map([["openai/gpt-5", 0.4]]),
),
{ usedTokens: 1, inputTokens: 1 },
);

// A normal positive fractional cap still rounds and stamps as expected.
NodeAssert.deepEqual(
openCodeTokenUsageSnapshot(
{
...baseInfo,
cost: 0,
tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
} as AssistantMessage,
new Map([["openai/gpt-5", 199_999.6]]),
),
{ usedTokens: 1, inputTokens: 1, maxTokens: 200_000 },
);
}),
);

Expand Down
45 changes: 44 additions & 1 deletion apps/server/src/provider/Layers/OpenCodeAdapter.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -255,6 +255,14 @@ interface OpenCodeSessionContext {
activeTurnId: TurnId | undefined;
activeAgent: string | undefined;
activeVariant: string | undefined;
/**
* Per-model context window caps, in tokens. Keyed by `"<providerID>/<modelID>"`.
* Populated once per session from `provider.list` so each assistant message can
* stamp `maxTokens` into the token-usage snapshot without re-querying the SDK.
* Empty when the inventory load failed — the meter then degrades to the
* bare-count UI it had before.
*/
modelLimits: ReadonlyMap<string, number>;
/**
* Cost/token/stop-reason from the active turn's assistant message, stashed
* here because OpenCode reports them on `message.updated` while
Expand DownExpand Up@@ -565,6 +573,7 @@ function toolStateCreatedAt(part: Extract<Part, { type: "tool" }>): string | und
*/
export function openCodeTokenUsageSnapshot(
info: AssistantMessage,
modelLimits?: ReadonlyMap<string, number>,
): ThreadTokenUsageSnapshot | undefined {
const tokens = info.tokens as Partial<AssistantMessage["tokens"]> | undefined;
if (!tokens || typeof tokens !== "object") {
Expand All@@ -578,12 +587,21 @@ export function openCodeTokenUsageSnapshot(
if (usedTokens <= 0) {
return undefined;
}
const rawMaxTokens = modelLimits?.get(`${info.providerID}/${info.modelID}`);
// Schema is Schema.optional(PositiveInt); round defensively in case an SDK
// ever emits a fractional cap, and re-check positivity after rounding --
// a sub-1 input like 0.4 rounds to 0, which would violate PositiveInt.
const roundedMaxTokens =
typeof rawMaxTokens === "number" && rawMaxTokens > 0 ? Math.round(rawMaxTokens) : undefined;
return {
usedTokens,
...(input > 0 ? { inputTokens: input } : {}),
...(output > 0 ? { outputTokens: output } : {}),
...(reasoning > 0 ? { reasoningOutputTokens: reasoning } : {}),
...(cachedRead > 0 ? { cachedInputTokens: cachedRead } : {}),
...(roundedMaxTokens !== undefined && roundedMaxTokens > 0
? { maxTokens: roundedMaxTokens }
: {}),
};
}

Expand DownExpand Up@@ -1034,7 +1052,10 @@ export function makeOpenCodeAdapter(
yield* emitAssistantTextDelta(context, part, turnId, event);
}

const tokenUsage = openCodeTokenUsageSnapshot(event.properties.info);
const tokenUsage = openCodeTokenUsageSnapshot(
event.properties.info,
context.modelLimits,
);
const totalCostUsd =
typeof event.properties.info.cost === "number"
? event.properties.info.cost
Expand DownExpand Up@@ -1626,11 +1647,33 @@ export function makeOpenCodeAdapter(
activeTurnId: undefined,
activeAgent: undefined,
activeVariant: undefined,
modelLimits: new Map(),
lastAssistantUsage: undefined,
stopped: yield* Ref.make(false),
sessionScope: started.sessionScope,
};
sessions.set(input.threadId, context);
// Fire-and-forget: a slow/failing provider.list must not delay or
// fail session startup. The meter just shows bare counts until this
// resolves (or forever, if it never does).
yield* Effect.gen(function* () {
const inventory = yield* openCodeRuntime
.loadOpenCodeInventory(context.client)
.pipe(Effect.orElseSucceed(() => undefined));
if (!inventory) {
return;
}
const limits = new Map<string, number>();
for (const provider of inventory.providerList.all) {
for (const model of Object.values(provider.models)) {
const ctx = model.limit?.context;
if (typeof ctx === "number" && ctx > 0) {
limits.set(`${provider.id}/${model.id}`, ctx);
}
}
}
context.modelLimits = limits;
}).pipe(Effect.forkIn(context.sessionScope));
yield* startEventPump(context);

yield* emit({
Expand Down
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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feat(server): stamp maxTokens into OpenCode's token-usage snapshot#47

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to your account

 Merged

buluma
merged 2 commits into

from

Sep 2, 2026
 Merged


feat(server): stamp maxTokens into OpenCode's token-usage snapshot
#47
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9b60e97

feat(server): stamp maxTokens into OpenCode's token-usage snapshot


buluma Sep 2, 2026
84c8f4a

fix(server): omit maxTokens when rounding a fractional cap produces zero


buluma Sep 2, 2026

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79 changes: 79 additions & 0 deletions
apps/server/src/provider/Layers/OpenCodeAdapter.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1104,6 +1104,85 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
 } as AssistantMessage),
 undefined,
 );

 const limits = new Map([
 ["openai/gpt-5", 200_000],
 ["anthropic/claude-sonnet-5", 1_000_000],
 ]);

 // A matching provider/model key stamps maxTokens into the snapshot.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0.0042,
 tokens: { input: 100, output: 40, reasoning: 10, cache: { read: 5, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 {
 usedTokens: 150,
 inputTokens: 100,
 outputTokens: 40,
 reasoningOutputTokens: 10,
 cachedInputTokens: 5,
 maxTokens: 200_000,
 },
 );

 // Unknown provider/model -- no maxTokens even though the map has other entries.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 modelID: "gpt-5-mini",
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // Zero/negative entries in the map are ignored -- the schema field is a PositiveInt.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A sub-1 fractional cap rounds to 0, which would violate the
 // PositiveInt schema field -- must be omitted, not emitted as 0.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0.4]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A normal positive fractional cap still rounds and stamps as expected.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 199_999.6]]),
 ),
 { usedTokens: 1, inputTokens: 1, maxTokens: 200_000 },
 );
 }),
 );

Expand Down

45 changes: 44 additions & 1 deletion
apps/server/src/provider/Layers/OpenCodeAdapter.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -255,6 +255,14 @@ interface OpenCodeSessionContext {
 activeTurnId: TurnId | undefined;
 activeAgent: string | undefined;
 activeVariant: string | undefined;
 /**
 * Per-model context window caps, in tokens. Keyed by `"<providerID>/<modelID>"`.
 * Populated once per session from `provider.list` so each assistant message can
 * stamp `maxTokens` into the token-usage snapshot without re-querying the SDK.
 * Empty when the inventory load failed — the meter then degrades to the
 * bare-count UI it had before.
 */
 modelLimits: ReadonlyMap<string, number>;
 /**
 * Cost/token/stop-reason from the active turn's assistant message, stashed
 * here because OpenCode reports them on `message.updated` while
Expand DownExpand Up@@ -565,6 +573,7 @@ function toolStateCreatedAt(part: Extract<Part, { type: "tool" }>): string | und
 */
export function openCodeTokenUsageSnapshot(
 info: AssistantMessage,
 modelLimits?: ReadonlyMap<string, number>,
): ThreadTokenUsageSnapshot | undefined {
 const tokens = info.tokens as Partial<AssistantMessage["tokens"]> | undefined;
 if (!tokens || typeof tokens !== "object") {
Expand All@@ -578,12 +587,21 @@ export function openCodeTokenUsageSnapshot(
 if (usedTokens <= 0) {
 return undefined;
 }
 const rawMaxTokens = modelLimits?.get(`${info.providerID}/${info.modelID}`);
 // Schema is Schema.optional(PositiveInt); round defensively in case an SDK
 // ever emits a fractional cap, and re-check positivity after rounding --
 // a sub-1 input like 0.4 rounds to 0, which would violate PositiveInt.
 const roundedMaxTokens =
 typeof rawMaxTokens === "number" && rawMaxTokens > 0 ? Math.round(rawMaxTokens) : undefined;
 return {
 usedTokens,
 ...(input > 0 ? { inputTokens: input } : {}),
 ...(output > 0 ? { outputTokens: output } : {}),
 ...(reasoning > 0 ? { reasoningOutputTokens: reasoning } : {}),
 ...(cachedRead > 0 ? { cachedInputTokens: cachedRead } : {}),
 ...(roundedMaxTokens !== undefined && roundedMaxTokens > 0
 ? { maxTokens: roundedMaxTokens }
 : {}),
 };
}

Expand DownExpand Up@@ -1034,7 +1052,10 @@ export function makeOpenCodeAdapter(
 yield* emitAssistantTextDelta(context, part, turnId, event);
 }

 const tokenUsage = openCodeTokenUsageSnapshot(event.properties.info);
 const tokenUsage = openCodeTokenUsageSnapshot(
 event.properties.info,
 context.modelLimits,
 );
 const totalCostUsd =
 typeof event.properties.info.cost === "number"
 ? event.properties.info.cost
Expand DownExpand Up@@ -1626,11 +1647,33 @@ export function makeOpenCodeAdapter(
 activeTurnId: undefined,
 activeAgent: undefined,
 activeVariant: undefined,
 modelLimits: new Map(),
 lastAssistantUsage: undefined,
 stopped: yield* Ref.make(false),
 sessionScope: started.sessionScope,
 };
 sessions.set(input.threadId, context);
 // Fire-and-forget: a slow/failing provider.list must not delay or
 // fail session startup. The meter just shows bare counts until this
 // resolves (or forever, if it never does).
 yield* Effect.gen(function* () {
 const inventory = yield* openCodeRuntime
 .loadOpenCodeInventory(context.client)
 .pipe(Effect.orElseSucceed(() => undefined));
 if (!inventory) {
 return;
 }
 const limits = new Map<string, number>();
 for (const provider of inventory.providerList.all) {
 for (const model of Object.values(provider.models)) {
 const ctx = model.limit?.context;
 if (typeof ctx === "number" && ctx > 0) {
 limits.set(`${provider.id}/${model.id}`, ctx);
 }
 }
 }
 context.modelLimits = limits;
 }).pipe(Effect.forkIn(context.sessionScope));
 yield* startEventPump(context);

 yield* emit({
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(server): stamp maxTokens into OpenCode's token-usage snapshot#47

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to your account

 Merged

buluma
merged 2 commits into

from

Sep 2, 2026
 Merged


feat(server): stamp maxTokens into OpenCode's token-usage snapshot
#47
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9b60e97

feat(server): stamp maxTokens into OpenCode's token-usage snapshot


buluma Sep 2, 2026
84c8f4a

fix(server): omit maxTokens when rounding a fractional cap produces zero


buluma Sep 2, 2026

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79 changes: 79 additions & 0 deletions
apps/server/src/provider/Layers/OpenCodeAdapter.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1104,6 +1104,85 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
 } as AssistantMessage),
 undefined,
 );

 const limits = new Map([
 ["openai/gpt-5", 200_000],
 ["anthropic/claude-sonnet-5", 1_000_000],
 ]);

 // A matching provider/model key stamps maxTokens into the snapshot.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0.0042,
 tokens: { input: 100, output: 40, reasoning: 10, cache: { read: 5, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 {
 usedTokens: 150,
 inputTokens: 100,
 outputTokens: 40,
 reasoningOutputTokens: 10,
 cachedInputTokens: 5,
 maxTokens: 200_000,
 },
 );

 // Unknown provider/model -- no maxTokens even though the map has other entries.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 modelID: "gpt-5-mini",
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // Zero/negative entries in the map are ignored -- the schema field is a PositiveInt.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A sub-1 fractional cap rounds to 0, which would violate the
 // PositiveInt schema field -- must be omitted, not emitted as 0.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0.4]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A normal positive fractional cap still rounds and stamps as expected.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 199_999.6]]),
 ),
 { usedTokens: 1, inputTokens: 1, maxTokens: 200_000 },
 );
 }),
 );

Expand Down

45 changes: 44 additions & 1 deletion
apps/server/src/provider/Layers/OpenCodeAdapter.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -255,6 +255,14 @@ interface OpenCodeSessionContext {
 activeTurnId: TurnId | undefined;
 activeAgent: string | undefined;
 activeVariant: string | undefined;
 /**
 * Per-model context window caps, in tokens. Keyed by `"<providerID>/<modelID>"`.
 * Populated once per session from `provider.list` so each assistant message can
 * stamp `maxTokens` into the token-usage snapshot without re-querying the SDK.
 * Empty when the inventory load failed — the meter then degrades to the
 * bare-count UI it had before.
 */
 modelLimits: ReadonlyMap<string, number>;
 /**
 * Cost/token/stop-reason from the active turn's assistant message, stashed
 * here because OpenCode reports them on `message.updated` while
Expand DownExpand Up@@ -565,6 +573,7 @@ function toolStateCreatedAt(part: Extract<Part, { type: "tool" }>): string | und
 */
export function openCodeTokenUsageSnapshot(
 info: AssistantMessage,
 modelLimits?: ReadonlyMap<string, number>,
): ThreadTokenUsageSnapshot | undefined {
 const tokens = info.tokens as Partial<AssistantMessage["tokens"]> | undefined;
 if (!tokens || typeof tokens !== "object") {
Expand All@@ -578,12 +587,21 @@ export function openCodeTokenUsageSnapshot(
 if (usedTokens <= 0) {
 return undefined;
 }
 const rawMaxTokens = modelLimits?.get(`${info.providerID}/${info.modelID}`);
 // Schema is Schema.optional(PositiveInt); round defensively in case an SDK
 // ever emits a fractional cap, and re-check positivity after rounding --
 // a sub-1 input like 0.4 rounds to 0, which would violate PositiveInt.
 const roundedMaxTokens =
 typeof rawMaxTokens === "number" && rawMaxTokens > 0 ? Math.round(rawMaxTokens) : undefined;
 return {
 usedTokens,
 ...(input > 0 ? { inputTokens: input } : {}),
 ...(output > 0 ? { outputTokens: output } : {}),
 ...(reasoning > 0 ? { reasoningOutputTokens: reasoning } : {}),
 ...(cachedRead > 0 ? { cachedInputTokens: cachedRead } : {}),
 ...(roundedMaxTokens !== undefined && roundedMaxTokens > 0
 ? { maxTokens: roundedMaxTokens }
 : {}),
 };
}

Expand DownExpand Up@@ -1034,7 +1052,10 @@ export function makeOpenCodeAdapter(
 yield* emitAssistantTextDelta(context, part, turnId, event);
 }

 const tokenUsage = openCodeTokenUsageSnapshot(event.properties.info);
 const tokenUsage = openCodeTokenUsageSnapshot(
 event.properties.info,
 context.modelLimits,
 );
 const totalCostUsd =
 typeof event.properties.info.cost === "number"
 ? event.properties.info.cost
Expand DownExpand Up@@ -1626,11 +1647,33 @@ export function makeOpenCodeAdapter(
 activeTurnId: undefined,
 activeAgent: undefined,
 activeVariant: undefined,
 modelLimits: new Map(),
 lastAssistantUsage: undefined,
 stopped: yield* Ref.make(false),
 sessionScope: started.sessionScope,
 };
 sessions.set(input.threadId, context);
 // Fire-and-forget: a slow/failing provider.list must not delay or
 // fail session startup. The meter just shows bare counts until this
 // resolves (or forever, if it never does).
 yield* Effect.gen(function* () {
 const inventory = yield* openCodeRuntime
 .loadOpenCodeInventory(context.client)
 .pipe(Effect.orElseSucceed(() => undefined));
 if (!inventory) {
 return;
 }
 const limits = new Map<string, number>();
 for (const provider of inventory.providerList.all) {
 for (const model of Object.values(provider.models)) {
 const ctx = model.limit?.context;
 if (typeof ctx === "number" && ctx > 0) {
 limits.set(`${provider.id}/${model.id}`, ctx);
 }
 }
 }
 context.modelLimits = limits;
 }).pipe(Effect.forkIn(context.sessionScope));
 yield* startEventPump(context);

 yield* emit({
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(server): stamp maxTokens into OpenCode's token-usage snapshot#47

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buluma
merged 2 commits into

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Sep 2, 2026
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feat(server): stamp maxTokens into OpenCode's token-usage snapshot
#47
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9b60e97

feat(server): stamp maxTokens into OpenCode's token-usage snapshot


buluma Sep 2, 2026
84c8f4a

fix(server): omit maxTokens when rounding a fractional cap produces zero


buluma Sep 2, 2026

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79 changes: 79 additions & 0 deletions
apps/server/src/provider/Layers/OpenCodeAdapter.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1104,6 +1104,85 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
 } as AssistantMessage),
 undefined,
 );

 const limits = new Map([
 ["openai/gpt-5", 200_000],
 ["anthropic/claude-sonnet-5", 1_000_000],
 ]);

 // A matching provider/model key stamps maxTokens into the snapshot.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0.0042,
 tokens: { input: 100, output: 40, reasoning: 10, cache: { read: 5, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 {
 usedTokens: 150,
 inputTokens: 100,
 outputTokens: 40,
 reasoningOutputTokens: 10,
 cachedInputTokens: 5,
 maxTokens: 200_000,
 },
 );

 // Unknown provider/model -- no maxTokens even though the map has other entries.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 modelID: "gpt-5-mini",
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // Zero/negative entries in the map are ignored -- the schema field is a PositiveInt.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A sub-1 fractional cap rounds to 0, which would violate the
 // PositiveInt schema field -- must be omitted, not emitted as 0.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0.4]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A normal positive fractional cap still rounds and stamps as expected.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 199_999.6]]),
 ),
 { usedTokens: 1, inputTokens: 1, maxTokens: 200_000 },
 );
 }),
 );

Expand Down

45 changes: 44 additions & 1 deletion
apps/server/src/provider/Layers/OpenCodeAdapter.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -255,6 +255,14 @@ interface OpenCodeSessionContext {
 activeTurnId: TurnId | undefined;
 activeAgent: string | undefined;
 activeVariant: string | undefined;
 /**
 * Per-model context window caps, in tokens. Keyed by `"<providerID>/<modelID>"`.
 * Populated once per session from `provider.list` so each assistant message can
 * stamp `maxTokens` into the token-usage snapshot without re-querying the SDK.
 * Empty when the inventory load failed — the meter then degrades to the
 * bare-count UI it had before.
 */
 modelLimits: ReadonlyMap<string, number>;
 /**
 * Cost/token/stop-reason from the active turn's assistant message, stashed
 * here because OpenCode reports them on `message.updated` while
Expand DownExpand Up@@ -565,6 +573,7 @@ function toolStateCreatedAt(part: Extract<Part, { type: "tool" }>): string | und
 */
export function openCodeTokenUsageSnapshot(
 info: AssistantMessage,
 modelLimits?: ReadonlyMap<string, number>,
): ThreadTokenUsageSnapshot | undefined {
 const tokens = info.tokens as Partial<AssistantMessage["tokens"]> | undefined;
 if (!tokens || typeof tokens !== "object") {
Expand All@@ -578,12 +587,21 @@ export function openCodeTokenUsageSnapshot(
 if (usedTokens <= 0) {
 return undefined;
 }
 const rawMaxTokens = modelLimits?.get(`${info.providerID}/${info.modelID}`);
 // Schema is Schema.optional(PositiveInt); round defensively in case an SDK
 // ever emits a fractional cap, and re-check positivity after rounding --
 // a sub-1 input like 0.4 rounds to 0, which would violate PositiveInt.
 const roundedMaxTokens =
 typeof rawMaxTokens === "number" && rawMaxTokens > 0 ? Math.round(rawMaxTokens) : undefined;
 return {
 usedTokens,
 ...(input > 0 ? { inputTokens: input } : {}),
 ...(output > 0 ? { outputTokens: output } : {}),
 ...(reasoning > 0 ? { reasoningOutputTokens: reasoning } : {}),
 ...(cachedRead > 0 ? { cachedInputTokens: cachedRead } : {}),
 ...(roundedMaxTokens !== undefined && roundedMaxTokens > 0
 ? { maxTokens: roundedMaxTokens }
 : {}),
 };
}

Expand DownExpand Up@@ -1034,7 +1052,10 @@ export function makeOpenCodeAdapter(
 yield* emitAssistantTextDelta(context, part, turnId, event);
 }

 const tokenUsage = openCodeTokenUsageSnapshot(event.properties.info);
 const tokenUsage = openCodeTokenUsageSnapshot(
 event.properties.info,
 context.modelLimits,
 );
 const totalCostUsd =
 typeof event.properties.info.cost === "number"
 ? event.properties.info.cost
Expand DownExpand Up@@ -1626,11 +1647,33 @@ export function makeOpenCodeAdapter(
 activeTurnId: undefined,
 activeAgent: undefined,
 activeVariant: undefined,
 modelLimits: new Map(),
 lastAssistantUsage: undefined,
 stopped: yield* Ref.make(false),
 sessionScope: started.sessionScope,
 };
 sessions.set(input.threadId, context);
 // Fire-and-forget: a slow/failing provider.list must not delay or
 // fail session startup. The meter just shows bare counts until this
 // resolves (or forever, if it never does).
 yield* Effect.gen(function* () {
 const inventory = yield* openCodeRuntime
 .loadOpenCodeInventory(context.client)
 .pipe(Effect.orElseSucceed(() => undefined));
 if (!inventory) {
 return;
 }
 const limits = new Map<string, number>();
 for (const provider of inventory.providerList.all) {
 for (const model of Object.values(provider.models)) {
 const ctx = model.limit?.context;
 if (typeof ctx === "number" && ctx > 0) {
 limits.set(`${provider.id}/${model.id}`, ctx);
 }
 }
 }
 context.modelLimits = limits;
 }).pipe(Effect.forkIn(context.sessionScope));
 yield* startEventPump(context);

 yield* emit({
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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feat(server): stamp maxTokens into OpenCode's token-usage snapshot#47

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 Merged

buluma
merged 2 commits into

from

Sep 2, 2026
 Merged


feat(server): stamp maxTokens into OpenCode's token-usage snapshot
#47
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9b60e97

feat(server): stamp maxTokens into OpenCode's token-usage snapshot


buluma Sep 2, 2026
84c8f4a

fix(server): omit maxTokens when rounding a fractional cap produces zero


buluma Sep 2, 2026

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79 changes: 79 additions & 0 deletions
apps/server/src/provider/Layers/OpenCodeAdapter.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1104,6 +1104,85 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
 } as AssistantMessage),
 undefined,
 );

 const limits = new Map([
 ["openai/gpt-5", 200_000],
 ["anthropic/claude-sonnet-5", 1_000_000],
 ]);

 // A matching provider/model key stamps maxTokens into the snapshot.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0.0042,
 tokens: { input: 100, output: 40, reasoning: 10, cache: { read: 5, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 {
 usedTokens: 150,
 inputTokens: 100,
 outputTokens: 40,
 reasoningOutputTokens: 10,
 cachedInputTokens: 5,
 maxTokens: 200_000,
 },
 );

 // Unknown provider/model -- no maxTokens even though the map has other entries.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 modelID: "gpt-5-mini",
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // Zero/negative entries in the map are ignored -- the schema field is a PositiveInt.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A sub-1 fractional cap rounds to 0, which would violate the
 // PositiveInt schema field -- must be omitted, not emitted as 0.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0.4]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A normal positive fractional cap still rounds and stamps as expected.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 199_999.6]]),
 ),
 { usedTokens: 1, inputTokens: 1, maxTokens: 200_000 },
 );
 }),
 );

Expand Down

45 changes: 44 additions & 1 deletion
apps/server/src/provider/Layers/OpenCodeAdapter.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -255,6 +255,14 @@ interface OpenCodeSessionContext {
 activeTurnId: TurnId | undefined;
 activeAgent: string | undefined;
 activeVariant: string | undefined;
 /**
 * Per-model context window caps, in tokens. Keyed by `"<providerID>/<modelID>"`.
 * Populated once per session from `provider.list` so each assistant message can
 * stamp `maxTokens` into the token-usage snapshot without re-querying the SDK.
 * Empty when the inventory load failed — the meter then degrades to the
 * bare-count UI it had before.
 */
 modelLimits: ReadonlyMap<string, number>;
 /**
 * Cost/token/stop-reason from the active turn's assistant message, stashed
 * here because OpenCode reports them on `message.updated` while
Expand DownExpand Up@@ -565,6 +573,7 @@ function toolStateCreatedAt(part: Extract<Part, { type: "tool" }>): string | und
 */
export function openCodeTokenUsageSnapshot(
 info: AssistantMessage,
 modelLimits?: ReadonlyMap<string, number>,
): ThreadTokenUsageSnapshot | undefined {
 const tokens = info.tokens as Partial<AssistantMessage["tokens"]> | undefined;
 if (!tokens || typeof tokens !== "object") {
Expand All@@ -578,12 +587,21 @@ export function openCodeTokenUsageSnapshot(
 if (usedTokens <= 0) {
 return undefined;
 }
 const rawMaxTokens = modelLimits?.get(`${info.providerID}/${info.modelID}`);
 // Schema is Schema.optional(PositiveInt); round defensively in case an SDK
 // ever emits a fractional cap, and re-check positivity after rounding --
 // a sub-1 input like 0.4 rounds to 0, which would violate PositiveInt.
 const roundedMaxTokens =
 typeof rawMaxTokens === "number" && rawMaxTokens > 0 ? Math.round(rawMaxTokens) : undefined;
 return {
 usedTokens,
 ...(input > 0 ? { inputTokens: input } : {}),
 ...(output > 0 ? { outputTokens: output } : {}),
 ...(reasoning > 0 ? { reasoningOutputTokens: reasoning } : {}),
 ...(cachedRead > 0 ? { cachedInputTokens: cachedRead } : {}),
 ...(roundedMaxTokens !== undefined && roundedMaxTokens > 0
 ? { maxTokens: roundedMaxTokens }
 : {}),
 };
}

Expand DownExpand Up@@ -1034,7 +1052,10 @@ export function makeOpenCodeAdapter(
 yield* emitAssistantTextDelta(context, part, turnId, event);
 }

 const tokenUsage = openCodeTokenUsageSnapshot(event.properties.info);
 const tokenUsage = openCodeTokenUsageSnapshot(
 event.properties.info,
 context.modelLimits,
 );
 const totalCostUsd =
 typeof event.properties.info.cost === "number"
 ? event.properties.info.cost
Expand DownExpand Up@@ -1626,11 +1647,33 @@ export function makeOpenCodeAdapter(
 activeTurnId: undefined,
 activeAgent: undefined,
 activeVariant: undefined,
 modelLimits: new Map(),
 lastAssistantUsage: undefined,
 stopped: yield* Ref.make(false),
 sessionScope: started.sessionScope,
 };
 sessions.set(input.threadId, context);
 // Fire-and-forget: a slow/failing provider.list must not delay or
 // fail session startup. The meter just shows bare counts until this
 // resolves (or forever, if it never does).
 yield* Effect.gen(function* () {
 const inventory = yield* openCodeRuntime
 .loadOpenCodeInventory(context.client)
 .pipe(Effect.orElseSucceed(() => undefined));
 if (!inventory) {
 return;
 }
 const limits = new Map<string, number>();
 for (const provider of inventory.providerList.all) {
 for (const model of Object.values(provider.models)) {
 const ctx = model.limit?.context;
 if (typeof ctx === "number" && ctx > 0) {
 limits.set(`${provider.id}/${model.id}`, ctx);
 }
 }
 }
 context.modelLimits = limits;
 }).pipe(Effect.forkIn(context.sessionScope));
 yield* startEventPump(context);

 yield* emit({
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(server): stamp maxTokens into OpenCode's token-usage snapshot#47

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 Merged

buluma
merged 2 commits into

from

Sep 2, 2026
 Merged


feat(server): stamp maxTokens into OpenCode's token-usage snapshot
#47
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9b60e97

feat(server): stamp maxTokens into OpenCode's token-usage snapshot


buluma Sep 2, 2026
84c8f4a

fix(server): omit maxTokens when rounding a fractional cap produces zero


buluma Sep 2, 2026

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79 changes: 79 additions & 0 deletions
apps/server/src/provider/Layers/OpenCodeAdapter.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1104,6 +1104,85 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
 } as AssistantMessage),
 undefined,
 );

 const limits = new Map([
 ["openai/gpt-5", 200_000],
 ["anthropic/claude-sonnet-5", 1_000_000],
 ]);

 // A matching provider/model key stamps maxTokens into the snapshot.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0.0042,
 tokens: { input: 100, output: 40, reasoning: 10, cache: { read: 5, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 {
 usedTokens: 150,
 inputTokens: 100,
 outputTokens: 40,
 reasoningOutputTokens: 10,
 cachedInputTokens: 5,
 maxTokens: 200_000,
 },
 );

 // Unknown provider/model -- no maxTokens even though the map has other entries.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 modelID: "gpt-5-mini",
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // Zero/negative entries in the map are ignored -- the schema field is a PositiveInt.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A sub-1 fractional cap rounds to 0, which would violate the
 // PositiveInt schema field -- must be omitted, not emitted as 0.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0.4]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A normal positive fractional cap still rounds and stamps as expected.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 199_999.6]]),
 ),
 { usedTokens: 1, inputTokens: 1, maxTokens: 200_000 },
 );
 }),
 );

Expand Down

45 changes: 44 additions & 1 deletion
apps/server/src/provider/Layers/OpenCodeAdapter.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -255,6 +255,14 @@ interface OpenCodeSessionContext {
 activeTurnId: TurnId | undefined;
 activeAgent: string | undefined;
 activeVariant: string | undefined;
 /**
 * Per-model context window caps, in tokens. Keyed by `"<providerID>/<modelID>"`.
 * Populated once per session from `provider.list` so each assistant message can
 * stamp `maxTokens` into the token-usage snapshot without re-querying the SDK.
 * Empty when the inventory load failed — the meter then degrades to the
 * bare-count UI it had before.
 */
 modelLimits: ReadonlyMap<string, number>;
 /**
 * Cost/token/stop-reason from the active turn's assistant message, stashed
 * here because OpenCode reports them on `message.updated` while
Expand DownExpand Up@@ -565,6 +573,7 @@ function toolStateCreatedAt(part: Extract<Part, { type: "tool" }>): string | und
 */
export function openCodeTokenUsageSnapshot(
 info: AssistantMessage,
 modelLimits?: ReadonlyMap<string, number>,
): ThreadTokenUsageSnapshot | undefined {
 const tokens = info.tokens as Partial<AssistantMessage["tokens"]> | undefined;
 if (!tokens || typeof tokens !== "object") {
Expand All@@ -578,12 +587,21 @@ export function openCodeTokenUsageSnapshot(
 if (usedTokens <= 0) {
 return undefined;
 }
 const rawMaxTokens = modelLimits?.get(`${info.providerID}/${info.modelID}`);
 // Schema is Schema.optional(PositiveInt); round defensively in case an SDK
 // ever emits a fractional cap, and re-check positivity after rounding --
 // a sub-1 input like 0.4 rounds to 0, which would violate PositiveInt.
 const roundedMaxTokens =
 typeof rawMaxTokens === "number" && rawMaxTokens > 0 ? Math.round(rawMaxTokens) : undefined;
 return {
 usedTokens,
 ...(input > 0 ? { inputTokens: input } : {}),
 ...(output > 0 ? { outputTokens: output } : {}),
 ...(reasoning > 0 ? { reasoningOutputTokens: reasoning } : {}),
 ...(cachedRead > 0 ? { cachedInputTokens: cachedRead } : {}),
 ...(roundedMaxTokens !== undefined && roundedMaxTokens > 0
 ? { maxTokens: roundedMaxTokens }
 : {}),
 };
}

Expand DownExpand Up@@ -1034,7 +1052,10 @@ export function makeOpenCodeAdapter(
 yield* emitAssistantTextDelta(context, part, turnId, event);
 }

 const tokenUsage = openCodeTokenUsageSnapshot(event.properties.info);
 const tokenUsage = openCodeTokenUsageSnapshot(
 event.properties.info,
 context.modelLimits,
 );
 const totalCostUsd =
 typeof event.properties.info.cost === "number"
 ? event.properties.info.cost
Expand DownExpand Up@@ -1626,11 +1647,33 @@ export function makeOpenCodeAdapter(
 activeTurnId: undefined,
 activeAgent: undefined,
 activeVariant: undefined,
 modelLimits: new Map(),
 lastAssistantUsage: undefined,
 stopped: yield* Ref.make(false),
 sessionScope: started.sessionScope,
 };
 sessions.set(input.threadId, context);
 // Fire-and-forget: a slow/failing provider.list must not delay or
 // fail session startup. The meter just shows bare counts until this
 // resolves (or forever, if it never does).
 yield* Effect.gen(function* () {
 const inventory = yield* openCodeRuntime
 .loadOpenCodeInventory(context.client)
 .pipe(Effect.orElseSucceed(() => undefined));
 if (!inventory) {
 return;
 }
 const limits = new Map<string, number>();
 for (const provider of inventory.providerList.all) {
 for (const model of Object.values(provider.models)) {
 const ctx = model.limit?.context;
 if (typeof ctx === "number" && ctx > 0) {
 limits.set(`${provider.id}/${model.id}`, ctx);
 }
 }
 }
 context.modelLimits = limits;
 }).pipe(Effect.forkIn(context.sessionScope));
 yield* startEventPump(context);

 yield* emit({
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(server): stamp maxTokens into OpenCode's token-usage snapshot#47

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 Merged

buluma
merged 2 commits into

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Sep 2, 2026
 Merged


feat(server): stamp maxTokens into OpenCode's token-usage snapshot
#47
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9b60e97

feat(server): stamp maxTokens into OpenCode's token-usage snapshot


buluma Sep 2, 2026
84c8f4a

fix(server): omit maxTokens when rounding a fractional cap produces zero


buluma Sep 2, 2026

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79 changes: 79 additions & 0 deletions
apps/server/src/provider/Layers/OpenCodeAdapter.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1104,6 +1104,85 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
 } as AssistantMessage),
 undefined,
 );

 const limits = new Map([
 ["openai/gpt-5", 200_000],
 ["anthropic/claude-sonnet-5", 1_000_000],
 ]);

 // A matching provider/model key stamps maxTokens into the snapshot.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0.0042,
 tokens: { input: 100, output: 40, reasoning: 10, cache: { read: 5, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 {
 usedTokens: 150,
 inputTokens: 100,
 outputTokens: 40,
 reasoningOutputTokens: 10,
 cachedInputTokens: 5,
 maxTokens: 200_000,
 },
 );

 // Unknown provider/model -- no maxTokens even though the map has other entries.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 modelID: "gpt-5-mini",
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // Zero/negative entries in the map are ignored -- the schema field is a PositiveInt.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A sub-1 fractional cap rounds to 0, which would violate the
 // PositiveInt schema field -- must be omitted, not emitted as 0.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0.4]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A normal positive fractional cap still rounds and stamps as expected.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 199_999.6]]),
 ),
 { usedTokens: 1, inputTokens: 1, maxTokens: 200_000 },
 );
 }),
 );

Expand Down

45 changes: 44 additions & 1 deletion
apps/server/src/provider/Layers/OpenCodeAdapter.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -255,6 +255,14 @@ interface OpenCodeSessionContext {
 activeTurnId: TurnId | undefined;
 activeAgent: string | undefined;
 activeVariant: string | undefined;
 /**
 * Per-model context window caps, in tokens. Keyed by `"<providerID>/<modelID>"`.
 * Populated once per session from `provider.list` so each assistant message can
 * stamp `maxTokens` into the token-usage snapshot without re-querying the SDK.
 * Empty when the inventory load failed — the meter then degrades to the
 * bare-count UI it had before.
 */
 modelLimits: ReadonlyMap<string, number>;
 /**
 * Cost/token/stop-reason from the active turn's assistant message, stashed
 * here because OpenCode reports them on `message.updated` while
Expand DownExpand Up@@ -565,6 +573,7 @@ function toolStateCreatedAt(part: Extract<Part, { type: "tool" }>): string | und
 */
export function openCodeTokenUsageSnapshot(
 info: AssistantMessage,
 modelLimits?: ReadonlyMap<string, number>,
): ThreadTokenUsageSnapshot | undefined {
 const tokens = info.tokens as Partial<AssistantMessage["tokens"]> | undefined;
 if (!tokens || typeof tokens !== "object") {
Expand All@@ -578,12 +587,21 @@ export function openCodeTokenUsageSnapshot(
 if (usedTokens <= 0) {
 return undefined;
 }
 const rawMaxTokens = modelLimits?.get(`${info.providerID}/${info.modelID}`);
 // Schema is Schema.optional(PositiveInt); round defensively in case an SDK
 // ever emits a fractional cap, and re-check positivity after rounding --
 // a sub-1 input like 0.4 rounds to 0, which would violate PositiveInt.
 const roundedMaxTokens =
 typeof rawMaxTokens === "number" && rawMaxTokens > 0 ? Math.round(rawMaxTokens) : undefined;
 return {
 usedTokens,
 ...(input > 0 ? { inputTokens: input } : {}),
 ...(output > 0 ? { outputTokens: output } : {}),
 ...(reasoning > 0 ? { reasoningOutputTokens: reasoning } : {}),
 ...(cachedRead > 0 ? { cachedInputTokens: cachedRead } : {}),
 ...(roundedMaxTokens !== undefined && roundedMaxTokens > 0
 ? { maxTokens: roundedMaxTokens }
 : {}),
 };
}

Expand DownExpand Up@@ -1034,7 +1052,10 @@ export function makeOpenCodeAdapter(
 yield* emitAssistantTextDelta(context, part, turnId, event);
 }

 const tokenUsage = openCodeTokenUsageSnapshot(event.properties.info);
 const tokenUsage = openCodeTokenUsageSnapshot(
 event.properties.info,
 context.modelLimits,
 );
 const totalCostUsd =
 typeof event.properties.info.cost === "number"
 ? event.properties.info.cost
Expand DownExpand Up@@ -1626,11 +1647,33 @@ export function makeOpenCodeAdapter(
 activeTurnId: undefined,
 activeAgent: undefined,
 activeVariant: undefined,
 modelLimits: new Map(),
 lastAssistantUsage: undefined,
 stopped: yield* Ref.make(false),
 sessionScope: started.sessionScope,
 };
 sessions.set(input.threadId, context);
 // Fire-and-forget: a slow/failing provider.list must not delay or
 // fail session startup. The meter just shows bare counts until this
 // resolves (or forever, if it never does).
 yield* Effect.gen(function* () {
 const inventory = yield* openCodeRuntime
 .loadOpenCodeInventory(context.client)
 .pipe(Effect.orElseSucceed(() => undefined));
 if (!inventory) {
 return;
 }
 const limits = new Map<string, number>();
 for (const provider of inventory.providerList.all) {
 for (const model of Object.values(provider.models)) {
 const ctx = model.limit?.context;
 if (typeof ctx === "number" && ctx > 0) {
 limits.set(`${provider.id}/${model.id}`, ctx);
 }
 }
 }
 context.modelLimits = limits;
 }).pipe(Effect.forkIn(context.sessionScope));
 yield* startEventPump(context);

 yield* emit({
Expand Down
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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feat(server): stamp maxTokens into OpenCode's token-usage snapshot#47

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

buluma
merged 2 commits into

from

Sep 2, 2026
 Merged


feat(server): stamp maxTokens into OpenCode's token-usage snapshot
#47
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9b60e97

feat(server): stamp maxTokens into OpenCode's token-usage snapshot


buluma Sep 2, 2026
84c8f4a

fix(server): omit maxTokens when rounding a fractional cap produces zero


buluma Sep 2, 2026

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79 changes: 79 additions & 0 deletions
apps/server/src/provider/Layers/OpenCodeAdapter.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1104,6 +1104,85 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
 } as AssistantMessage),
 undefined,
 );

 const limits = new Map([
 ["openai/gpt-5", 200_000],
 ["anthropic/claude-sonnet-5", 1_000_000],
 ]);

 // A matching provider/model key stamps maxTokens into the snapshot.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0.0042,
 tokens: { input: 100, output: 40, reasoning: 10, cache: { read: 5, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 {
 usedTokens: 150,
 inputTokens: 100,
 outputTokens: 40,
 reasoningOutputTokens: 10,
 cachedInputTokens: 5,
 maxTokens: 200_000,
 },
 );

 // Unknown provider/model -- no maxTokens even though the map has other entries.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 modelID: "gpt-5-mini",
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 limits,
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // Zero/negative entries in the map are ignored -- the schema field is a PositiveInt.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A sub-1 fractional cap rounds to 0, which would violate the
 // PositiveInt schema field -- must be omitted, not emitted as 0.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 0.4]]),
 ),
 { usedTokens: 1, inputTokens: 1 },
 );

 // A normal positive fractional cap still rounds and stamps as expected.
 NodeAssert.deepEqual(
 openCodeTokenUsageSnapshot(
 {
 ...baseInfo,
 cost: 0,
 tokens: { input: 1, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
 } as AssistantMessage,
 new Map([["openai/gpt-5", 199_999.6]]),
 ),
 { usedTokens: 1, inputTokens: 1, maxTokens: 200_000 },
 );
 }),
 );

Expand Down

45 changes: 44 additions & 1 deletion
apps/server/src/provider/Layers/OpenCodeAdapter.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -255,6 +255,14 @@ interface OpenCodeSessionContext {
 activeTurnId: TurnId | undefined;
 activeAgent: string | undefined;
 activeVariant: string | undefined;
 /**
 * Per-model context window caps, in tokens. Keyed by `"<providerID>/<modelID>"`.
 * Populated once per session from `provider.list` so each assistant message can
 * stamp `maxTokens` into the token-usage snapshot without re-querying the SDK.
 * Empty when the inventory load failed — the meter then degrades to the
 * bare-count UI it had before.
 */
 modelLimits: ReadonlyMap<string, number>;
 /**
 * Cost/token/stop-reason from the active turn's assistant message, stashed
 * here because OpenCode reports them on `message.updated` while
Expand DownExpand Up@@ -565,6 +573,7 @@ function toolStateCreatedAt(part: Extract<Part, { type: "tool" }>): string | und
 */
export function openCodeTokenUsageSnapshot(
 info: AssistantMessage,
 modelLimits?: ReadonlyMap<string, number>,
): ThreadTokenUsageSnapshot | undefined {
 const tokens = info.tokens as Partial<AssistantMessage["tokens"]> | undefined;
 if (!tokens || typeof tokens !== "object") {
Expand All@@ -578,12 +587,21 @@ export function openCodeTokenUsageSnapshot(
 if (usedTokens <= 0) {
 return undefined;
 }
 const rawMaxTokens = modelLimits?.get(`${info.providerID}/${info.modelID}`);
 // Schema is Schema.optional(PositiveInt); round defensively in case an SDK
 // ever emits a fractional cap, and re-check positivity after rounding --
 // a sub-1 input like 0.4 rounds to 0, which would violate PositiveInt.
 const roundedMaxTokens =
 typeof rawMaxTokens === "number" && rawMaxTokens > 0 ? Math.round(rawMaxTokens) : undefined;
 return {
 usedTokens,
 ...(input > 0 ? { inputTokens: input } : {}),
 ...(output > 0 ? { outputTokens: output } : {}),
 ...(reasoning > 0 ? { reasoningOutputTokens: reasoning } : {}),
 ...(cachedRead > 0 ? { cachedInputTokens: cachedRead } : {}),
 ...(roundedMaxTokens !== undefined && roundedMaxTokens > 0
 ? { maxTokens: roundedMaxTokens }
 : {}),
 };
}

Expand DownExpand Up@@ -1034,7 +1052,10 @@ export function makeOpenCodeAdapter(
 yield* emitAssistantTextDelta(context, part, turnId, event);
 }

 const tokenUsage = openCodeTokenUsageSnapshot(event.properties.info);
 const tokenUsage = openCodeTokenUsageSnapshot(
 event.properties.info,
 context.modelLimits,
 );
 const totalCostUsd =
 typeof event.properties.info.cost === "number"
 ? event.properties.info.cost
Expand DownExpand Up@@ -1626,11 +1647,33 @@ export function makeOpenCodeAdapter(
 activeTurnId: undefined,
 activeAgent: undefined,
 activeVariant: undefined,
 modelLimits: new Map(),
 lastAssistantUsage: undefined,
 stopped: yield* Ref.make(false),
 sessionScope: started.sessionScope,
 };
 sessions.set(input.threadId, context);
 // Fire-and-forget: a slow/failing provider.list must not delay or
 // fail session startup. The meter just shows bare counts until this
 // resolves (or forever, if it never does).
 yield* Effect.gen(function* () {
 const inventory = yield* openCodeRuntime
 .loadOpenCodeInventory(context.client)
 .pipe(Effect.orElseSucceed(() => undefined));
 if (!inventory) {
 return;
 }
 const limits = new Map<string, number>();
 for (const provider of inventory.providerList.all) {
 for (const model of Object.values(provider.models)) {
 const ctx = model.limit?.context;
 if (typeof ctx === "number" && ctx > 0) {
 limits.set(`${provider.id}/${model.id}`, ctx);
 }
 }
 }
 context.modelLimits = limits;
 }).pipe(Effect.forkIn(context.sessionScope));
 yield* startEventPump(context);

 yield* emit({
Expand Down
Loading