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feat(core): replace instruction checkpoints with value-delta sync (#36254)

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Kit Langton 2026-07-10 13:26:25 -04:00 • committed by GitHub
commit 96a9731947
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57 changed files with 2053 additions and 1278 deletions
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24
packages/core/src/mcp/guidance.ts
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@ -70,8 +70,19 @@ export const layer = Layer.effect(
load: Effect.fn("McpGuidance.load")(function* (selection) {
const agent = selection.info
if (!agent) return Instructions.empty
const source = (value: ReadonlyArray<Summary> | Instructions.Removed) =>
Instructions.make<ReadonlyArray<Summary>>({
key: Instructions.Key.make("core/mcp-guidance"),
codec: Schema.toCodecJson(Schema.Array(Summary)),
read: Effect.succeed(value),
render: {
initial: render,
changed: update,
removed: () => "MCP server instructions are no longer available.",
},
})
if (Flag.CODEMODE_ENABLED && PermissionV2.evaluate("execute", "*", agent.permissions).effect === "deny")
return Instructions.empty
return source(Instructions.removed)
const [instructions, tools] = yield* Effect.all([mcp.instructions(), mcp.tools()], {
concurrency: "unbounded",
})
@ -88,15 +99,8 @@ export const layer = Layer.effect(
)
})
.map((item) => ({ server: item.server, instructions: item.instructions }))
if (visible.length === 0) return Instructions.empty
return Instructions.make({
key: Instructions.Key.make("core/mcp-guidance"),
codec: Schema.toCodecJson(Schema.Array(Summary)),
load: Effect.succeed(visible),
baseline: render,
update,
removed: () => "MCP server instructions are no longer available.",
})
.toSorted((a, b) => a.server.localeCompare(b.server))
return source(visible.length === 0 ? Instructions.removed : visible)
}),
})
}),