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Reorganize packages into a modular hierarchy

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Move the 18 flat packages/<name> packages into role-grouped dirs:
core/, llm/, bash/, session-persistence/, ui/, support/. Group dirs are
pure containers; each package keeps its @deepseek-ai/dsh-* name.

Collapse the per-package tsconfig paths maps (base + typecheck) into one
@deepseek-ai/dsh-* wildcard with a candidate per group, and derive the
publint list from the hierarchy. Update all depth-coupled globs/configs
(workspace, tsdown, vitest, eslint, knip, tsconfig includes/refs,
per-package tsconfigs, generators, doc-script scopes, type-equiv manifest)
and the cross-package/script relative imports in tests.

Fix doc-typecheck's workspacePaths() to parse tsconfig JSONC via the
TypeScript API instead of a regex comment-strip, which corrupted the
new wildcard `/*/` path candidates.

WIP: doc cross-links and package/RFC docs still to update.
This commit is contained in:
Tianyi Cui
2026-06-20 22:55:20 +08:00
parent 906705e353
commit d02e9f1bd6
191 changed files with 822 additions and 624 deletions
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301
packages/core/agent-loop/src/agent.ts Normal file
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/**
* The concrete Agent implementation: ReactLoopAgent plus its inbox. Everything
* observable happens through session events and the agent/* event taxonomy —
* plugins never need this class.
*
* @module dsh-agent-loop/agent
*/
import type { Context } from 'cordis'
import type { AgentId, AgentOptions, AgentStatus, SendOptions } from '@deepseek-ai/dsh-agent'
import type { Agent } from '@deepseek-ai/dsh-agent'
import type { ContentBlock, MessageSource } from '@deepseek-ai/dsh-llm'
import type { Session } from '@deepseek-ai/dsh-session'
import { Inbox } from './inbox.ts'
import { isTurnOpen, lastTurnNumber, runLoop } from './loop.ts'
/**
* The concrete {@link Agent} implementation owned by the agent-loop plugin.
*
* Owns the inbox (queued + steering FIFOs), the per-step AbortController, and
* the loop driver. Everything observable happens through session events and
* the agent/* event taxonomy — plugins never need this class.
*/
export class ReactLoopAgent implements Agent {
readonly inbox = new Inbox()
private _status: AgentStatus = 'idle'
private currentAbort: AbortController | undefined
/**
* Turn-scoped cancel marker, set by {@link cancel} and read/cleared by the
* driver loop (via the LoopHandle) at every point a turn could start or
* continue. Armed ONLY when there is something to cancel (a running turn, an
* in-flight step, or queued/steering work), so an idle no-op cancel cannot
* leave it set to wrongly drop a later prompt.
*/
private cancelRequested = false
/**
* The resolved reason for the pending {@link cancel} (`reason ?? 'cancelled'`),
* read by the driver loop's marker branches so a turn dropped in a
* marker-only window (pre-step / continuation, where no `AbortController`
* carries the reason) ends with the SAME `{kind:'aborted', reason}` the
* mid-step abort path produces from `abort.signal.reason`. Without this the
* caller's `cancel(reason)` would be silently replaced by the literal
* 'cancelled' whenever the cancel landed outside a running step — making the
* logged reason race-dependent and the public `reason?` param half-effective.
*/
private cancelReason = 'cancelled'
private disposed: Promise<void>
private resolveDisposed!: () => void
/** Resolves when the driver loop has fully exited (tests/disposal). */
done: Promise<void> = Promise.resolve()
/**
* Pending {@link whenIdle} waiters, resolved by {@link settleIdleWaiters} when
* the agent next settles out of `running`. Kept as internal agent state (NOT
* an effect-scoped `ctx.on` listener) so a concurrent fiber disposal — which
* runs the agent's own listeners' disposers — cannot drop the waiter before
* the `disposed` transition fires and leave the promise hanging.
*/
private idleWaiters: (() => void)[] = []
constructor(
private ctx: Context,
public readonly id: AgentId,
public readonly options: AgentOptions,
public readonly session: Session,
) {
const { promise, resolve } = Promise.withResolvers<void>()
this.disposed = promise
this.resolveDisposed = resolve
}
get status(): AgentStatus {
return this._status
}
private setStatus(status: AgentStatus): void {
if (this._status === status || this._status === 'disposed') return
this._status = status
// Release quiescence waiters on a transition OUT of running BEFORE emitting
// (the disposer handles the disposed transition separately). Settling first
// means a throwing `agent/status` subscriber cannot starve a `whenIdle()`
// waiter (AGENTS.md "contain callback exceptions" — a lifecycle await must
// not hang on one bad listener).
if (status !== 'running') this.settleIdleWaiters()
try {
this.ctx.emit('agent/status', this, status)
} catch (error: unknown) {
this.ctx.logger.warn(`agent "${this.id}": agent/status listener threw on ${status}: ${String(error)}`)
}
}
/**
* Resolve and clear all pending {@link whenIdle} waiters. Called on a
* running→idle transition (from {@link setStatus}) and on disposal (from the
* {@link start} disposer, which chains `done` for true loop-exit quiescence).
*/
private settleIdleWaiters(): void {
const waiters = this.idleWaiters
this.idleWaiters = []
for (const resolve of waiters) resolve()
}
private resolveSource(options?: SendOptions): MessageSource {
return options?.source ?? { kind: 'user' }
}
send(content: ContentBlock[], options?: SendOptions): void {
if (this._status === 'disposed') throw new Error(`agent "${this.id}" is disposed`)
const source = this.resolveSource(options)
this.inbox.enqueue({ content, source })
this.ctx.emit('agent/queued', this, content, { source, steering: false })
}
steer(content: ContentBlock[], options?: SendOptions): void {
if (this._status === 'disposed') throw new Error(`agent "${this.id}" is disposed`)
if (this._status !== 'running') { this.send(content, options); return }
const source = this.resolveSource(options)
this.inbox.steer({ content, source })
this.ctx.emit('agent/queued', this, content, { source, steering: true })
}
inject(content: ContentBlock[], options?: SendOptions): void {
if (this._status === 'disposed') throw new Error(`agent "${this.id}" is disposed`)
const source = this.resolveSource(options)
if (isTurnOpen(this.session)) {
// A turn is open in the LOG (decided from the log, not agent status —
// status can be `running` with no turn open): the context/message is
// turn-enclosed by that turn, so append it directly.
this.session.append('context/message', { content, source })
return
}
// No turn open: wrap the injection in a one-shot turn so every event stays
// turn-enclosed (the durability/replay boundary is the turn).
const turn = lastTurnNumber(this.session) + 1
// Once turn/start enters the log, a turn/end is OWED no matter what — even
// if a throwing `session/event` listener escapes from the turn/start append
// (Session.append pushes the event BEFORE notifying listeners) or the
// context/message append throws (non-serializable content, throwing
// listener). The finally re-checks the log via isTurnOpen() and closes the
// turn if one was actually opened, so the log never carries a permanently
// open injection turn that would corrupt later turns/replay. (If the
// turn/start append throws BEFORE pushing — non-serializable trigger, which
// can't happen for our fixed trigger — no turn was opened and none is owed.)
try {
this.session.append('turn/start', { turn, trigger: { kind: 'injection', source } })
this.session.append('context/message', { content, source })
} finally {
// Close the turn if turn/start made it into the log. Contain a throwing
// turn/end listener: Session.append pushes before notifying, so a throw
// here still leaves turn/end in the log (the turn is balanced) — swallow
// it so it neither replaces the original exception nor skips the flush
// decision below. (It surfaces through the flush path is not needed; the
// turn-balance contract is what matters and it holds.)
if (isTurnOpen(this.session)) {
try {
this.session.append('turn/end', { turn, reason: { kind: 'completed' } })
} catch {
// turn/end is already in the log (pushed before the listener threw),
// so the turn is balanced; the throw is the listener's bug.
}
}
// Decide the durability checkpoint from the LOG, not a flag: a turn was
// recorded iff this turn's turn/start is logged (it may have been closed
// by a throwing-listener turn/end above, which still counts). A
// `turnRecorded` boolean set after append('turn/end') would be skipped by
// a throwing turn/end listener, losing the flush for a balanced in-memory
// turn (crash before the next turn/dispose would drop the idle injection).
const turnRecorded = this.session.events.some(e => e.type === 'turn/start' && e.data.turn === turn)
// Checkpoint the one-shot turn for durability, exactly as the loop does at
// every turn/end. The loop is NOT running (we are idle), so nothing else
// will flush this turn. Fire-and-forget with error containment: inject()
// is synchronous, and a persistence backend failing must not throw into
// the caller (e.g. a tool-bash task-done callback). Disposal still drains
// independently, so a slow flush is safe. A flush failure is reported via
// agent/error (step 0 — the idle-injection convention, there is no real
// step) AND the logger, mirroring the loop's post-turn/end flush path so
// plugins monitoring agent/error see idle-injection persistence failures
// too. A throwing agent/error listener is contained.
if (turnRecorded) {
void Promise.resolve(this.ctx.parallel('session/flush', this.session)).catch((error: unknown) => {
const err = error instanceof Error ? error : new Error(String(error))
this.ctx.logger.warn(`agent "${this.id}": flush after idle injection failed: ${err.message}`)
try {
this.ctx.emit('agent/error', this, turn, 0, err)
} catch {
// contained: the failure is already logged; a throwing agent/error
// listener must not escape this fire-and-forget catch.
}
})
}
}
}
abort(reason?: string): void {
this.currentAbort?.abort(reason ?? 'aborted')
}
cancel(reason?: string): void {
// Arm-gate: only mark a cancellation when there is actually work to cancel —
// a running turn, an in-flight step, or queued/steering work. An idle cancel
// with nothing pending is a true no-op; arming the marker then would wrongly
// drop the NEXT legitimate prompt (the marker is consumed only at the loop's
// turn-decision points, which an idle parked loop does not reach until woken
// by a real send()). Note the gate canNOT be `status === 'running'` alone:
// the pre-step window (a send() queued but the loop not yet flipped to
// running) has status `idle` with `hasQueued` true, and the marker exists
// precisely to cover it.
if (this._status === 'running' || this.currentAbort !== undefined || this.inbox.hasQueued || this.inbox.hasSteering) {
this.cancelRequested = true
// Capture the resolved reason for the marker-only windows (pre-step /
// continuation). The mid-step path reads it from abort.signal.reason
// below; the marker path reads it via the LoopHandle's cancelReason().
this.cancelReason = reason ?? 'cancelled'
}
// Drop all pending queued + steering work (un-started prompts never run; the
// cancelled turn's steering is not re-enqueued). Cleared directly even when
// the loop is parked in waitForQueued — there is no turn to stop and nothing
// left for the parked loop to run, so no wake is needed.
this.inbox.clear()
// Interrupt an in-flight step immediately (the running turn observes the
// abort and ends `aborted`). The marker covers the windows where no step is
// running (pre-step, continuation).
this.currentAbort?.abort(reason ?? 'cancelled')
}
/**
* Resolve once the agent has reached quiescence after settling out of
* `running`. If it is already disposed, awaits {@link done} (the loop-exit
* promise) — `agent/status('disposed')` fires in the disposer BEFORE the
* driver loop has unwound, so it is NOT itself a quiescence signal. If it is
* idle AND has no queued work, resolves immediately. Otherwise queues an
* internal waiter (see {@link idleWaiters}) released on the next
* running→idle/disposed transition, resolving on `idle` directly (the turn
* fully ended) or chaining {@link done} on `disposed` (wait for the loop to
* actually exit). Implements the {@link Agent.whenIdle} contract used by
* teardown (`abort()` then `await whenIdle()`).
*/
whenIdle(): Promise<void> {
if (this._status === 'disposed') return this.done
if (this._status !== 'running' && !this.inbox.hasQueued) return Promise.resolve()
// Register an internal waiter (resolved by settleIdleWaiters on the next
// running→idle/disposed transition), NOT an effect-scoped `ctx.on` listener:
// a concurrent fiber disposal runs this agent's listener disposers, which
// could remove a `ctx.on` waiter before the `disposed` transition fires and
// hang the promise. On disposal the disposer settles the waiter AND we chain
// `done` here for true loop-exit quiescence (status flips to disposed before
// the loop unwinds); a plain idle transition resolves directly.
return new Promise<void>((resolve) => {
this.idleWaiters.push(() => {
resolve(this._status === 'disposed' ? this.done : undefined)
})
})
}
/**
* Start the driver loop. Returns a disposer: calling it sets status to
* `disposed`, emits `agent/status('disposed')`, resolves the disposed
* promise (unblocking the idle wait), releases any `whenIdle` waiters, and
* aborts the current request if any. The returned `agent.done` promise
* resolves once the loop exits.
*/
start(): () => void {
this.done = runLoop(this.ctx, this, {
setStatus: (status) => { this.setStatus(status) },
setAbort: controller => void (this.currentAbort = controller),
disposed: this.disposed,
isDisposed: () => this._status === 'disposed',
isCancelled: () => this.cancelRequested,
cancelReason: () => this.cancelReason,
clearCancel: () => { this.cancelRequested = false },
// Settle whenIdle() waiters WITHOUT a status transition — the pre-step
// cancel-skip path drops the about-to-run turn and re-parks without ever
// flipping running→idle, so a waiter registered in the pre-step window
// (status idle, hasQueued was true) would otherwise hang. This emits no
// agent/status, so an ACP agent/status listener never sees a spurious idle
// that would resolve a freshly-queued prompt as cancelled.
settleIdle: () => { this.settleIdleWaiters() },
})
// The disposer must be infallible: it runs inside the fiber's LIFO
// disposal chain, where a throw would skip later disposers (e.g. the
// registry unregistration) and leave `done` pending forever.
return () => {
if (this._status === 'disposed') return
this._status = 'disposed'
this.resolveDisposed()
// Release whenIdle waiters BEFORE the (guarded) event emit — they are
// internal state that must settle even if a listener throws below. Each
// waiter chains `done`, so it resolves only once the loop actually exits.
this.settleIdleWaiters()
this.currentAbort?.abort('disposed')
// setStatus refuses transitions out of 'disposed', so emit directly —
// 'disposed' is part of the agent/status contract. Guarded: a throwing
// listener must not break the disposal chain.
try {
this.ctx.emit('agent/status', this, 'disposed')
} catch {
// listener error during disposal — nothing safe left to do with it
}
}
}
}