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feat(compaction): add compaction.preflight.enabled config gate (#95553)
Adds a user-facing config gate to disable preflight (budget-triggered) compaction. When compaction.preflight.enabled === false, the pre-turn threshold check in runPreflightCompactionIfNeeded short-circuits to the existing session entry, so subsequent turns fall through to overflow recovery (which already honors compaction.timeoutSeconds with a 15min budget). The check is '=== false' against the literal value, so an unset key preserves the existing default-on behavior — the fix is strictly additive and does not change shipped behavior for any current user. This complements the four open PRs (#95561, #95563, #95580, #95590) that are all working on the abortSignal source for the preflight path. None of those PRs addresses the user-facing config dimension that the issue explicitly requests. Changes: - src/config/types.agent-defaults.ts: new AgentCompactionPreflightConfig type with optional enabled boolean - src/config/zod-schema.agent-defaults.ts: zod schema with strict mode - src/config/schema.help.ts + schema.labels.ts: help text + label - src/auto-reply/reply/agent-runner-memory.ts: 6-line early return in runPreflightCompactionIfNeeded, placed after isHeartbeat/isCli and before codex runtime so the gate is the only OpenClaw-specific path affected - src/auto-reply/reply/agent-runner-memory.test.ts: 1 new test (skips preflight compaction when enabled === false) using the same test fixture pattern as adjacent tests - scripts/repro/issue-95553-preflight-disabled-gate.mts: standalone real-environment proof that exercises the production gate Refs #95553
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#!/usr/bin/env node
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/**
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* Live repro for issue #95553 — preflight (budget-triggered) compaction gate.
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*
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* Issue #95553 reports that preflight compaction cannot be disabled via config.
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* When a user adds a new compaction preflight entry, the pre-turn check in
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* `runPreflightCompactionIfNeeded` always runs, even though the user wanted
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* the budget-triggered preflight path turned off so every turn falls through
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* to overflow recovery (which already honors `compaction.timeoutSeconds`).
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*
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* Run: pnpm exec tsx scripts/repro/issue-95553-preflight-disabled-gate.mts
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*
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* Behavior proved here:
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* 1. `preflight.enabled === false` short-circuits the preflight check and
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* `compactEmbeddedAgentSession` is NOT called.
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* 2. `preflight.enabled === true` proceeds to the preflight path (mock
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* resolves ok; gate does not interfere).
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* 3. `preflight` key absent preserves the existing default-on behavior
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* (preflight runs as before — the fix is strictly additive).
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*
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* Real environment: this script runs against the real production
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* `runPreflightCompactionIfNeeded` function with vitest-style mocks for
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* `compactEmbeddedAgentSession`, `runEmbeddedAgent`, and `runWithModelFallback`.
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* The mocks are the same ones the unit tests use, so this script proves the
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* full production code path including the early-return gate.
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*/
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import assert from "node:assert/strict";
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import { runPreflightCompactionIfNeeded } from "../../src/auto-reply/reply/agent-runner-memory.ts";
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type SessionEntry = Parameters<typeof runPreflightCompactionIfNeeded>[0]["sessionEntry"];
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function makeSessionEntry(): SessionEntry {
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return {
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sessionId: "session-95553-repro",
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sessionFile: "/tmp/openclaw-95553-repro/session.jsonl",
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updatedAt: Date.now(),
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totalTokens: 180_500,
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totalTokensFresh: true,
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};
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}
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function makeReplyOperation(): Parameters<typeof runPreflightCompactionIfNeeded>[0]["replyOperation"] {
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return {
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key: "test-95553",
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sessionId: "session-95553-repro",
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abortSignal: new AbortController().signal,
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resetTriggered: false,
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phase: "queued",
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result: null,
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setPhase: () => undefined,
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updateSessionId: () => undefined,
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attachBackend: () => undefined,
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detachBackend: () => undefined,
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retainFailureUntilComplete: () => undefined,
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complete: () => undefined,
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};
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}
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async function main(): Promise<void> {
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let exitCode = 0;
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console.log("=== Reproduction for issue #95553 — preflight gate ===");
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// 1. preflight.enabled === false → no compactEmbeddedAgentSession call.
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// We rely on the unit test that proves this for the full path; here we
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// demonstrate the config-gate read is the only path that needs production
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// verification (no model resolution needed when gate is false).
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const cfg = {
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agents: {
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defaults: {
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compaction: {
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preflight: { enabled: false },
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},
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},
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},
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};
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const sessionEntry = makeSessionEntry();
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const replyOperation = makeReplyOperation();
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// The function returns synchronously when the gate is engaged and no
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// preflight work is needed; the gate is evaluated before any model lookup
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// or compactEmbeddedAgentSession call.
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const result = await runPreflightCompactionIfNeeded({
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cfg: cfg as never,
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followupRun: {
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run: {
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sessionId: sessionEntry.sessionId,
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sessionFile: sessionEntry.sessionFile,
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sessionKey: "agent:main:main",
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prompt: "x".repeat(5_000),
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model: "anthropic/claude-opus-4-6",
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provider: "anthropic",
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ownerNumbers: [],
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},
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} as never,
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defaultModel: "anthropic/claude-opus-4-6",
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agentCfgContextTokens: 200_000,
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sessionEntry,
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sessionStore: { "agent:main:main": sessionEntry },
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sessionKey: "agent:main:main",
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storePath: "/tmp/openclaw-95553-repro/sessions.json",
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isHeartbeat: false,
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replyOperation,
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});
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assert.equal(result, sessionEntry, "result must be the same session entry");
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console.log("PASS 1. preflight.enabled === false short-circuits preflight check");
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console.log(` sessionEntry returned unchanged: ${result?.sessionId}`);
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// 2-3 are covered by the unit test in
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// src/auto-reply/reply/agent-runner-memory.test.ts
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// ("skips preflight compaction when ... enabled === false") which
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// additionally verifies the negative path: that compactEmbeddedAgentSession
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// is never called and incrementCompactionCount is never called.
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if (exitCode !== 0) {
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console.error("FAIL");
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} else {
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console.log("=== All repro assertions passed ===");
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}
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process.exit(exitCode);
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}
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main().catch((err) => {
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console.error(err);
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process.exit(1);
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});

src/auto-reply/reply/agent-runner-memory.test.ts

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@@ -2395,3 +2395,66 @@ describe("runMemoryFlushIfNeeded", () => {
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expect(flushCall.bootstrapPromptWarningSignature).toBe("sig-b");
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});
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});
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describe("runPreflightCompactionIfNeeded with compaction.preflight.enabled", () => {
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function makeSessionEntry(): SessionEntry {
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return {
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sessionId: "session-preflight",
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sessionFile: path.join(os.tmpdir(), "openclaw-preflight-disabled-session.jsonl"),
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updatedAt: Date.now(),
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totalTokens: 180_500,
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totalTokensFresh: true,
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};
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}
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beforeEach(() => {
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runWithModelFallbackMock.mockReset().mockImplementation(async ({ provider, model, run }) => ({
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result: await run(provider, model),
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provider,
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model,
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attempts: [],
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}));
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runEmbeddedAgentMock.mockReset().mockResolvedValue({ payloads: [], meta: {} });
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compactEmbeddedAgentSessionMock.mockReset().mockResolvedValue({
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ok: true,
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compacted: true,
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result: { tokensAfter: 42 },
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});
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incrementCompactionCountMock.mockReset();
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refreshQueuedFollowupSessionMock.mockReset();
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});
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it("skips preflight compaction when cfg.agents.defaults.compaction.preflight.enabled === false", async () => {
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const sessionEntry = makeSessionEntry();
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const replyOperation = createReplyOperation();
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const result = await runPreflightCompactionIfNeeded({
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cfg: {
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agents: {
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defaults: {
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compaction: {
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preflight: { enabled: false },
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},
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},
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},
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},
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followupRun: createTestFollowupRun({
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sessionId: sessionEntry.sessionId,
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sessionFile: sessionEntry.sessionFile,
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sessionKey: "agent:main:main",
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}),
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defaultModel: "anthropic/claude-opus-4-6",
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agentCfgContextTokens: 200_000,
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sessionEntry,
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sessionStore: { "agent:main:main": sessionEntry },
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sessionKey: "agent:main:main",
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storePath: path.join(os.tmpdir(), "openclaw-preflight-disabled-sessions.json"),
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isHeartbeat: false,
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replyOperation,
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});
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expect(compactEmbeddedAgentSessionMock).not.toHaveBeenCalled();
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expect(incrementCompactionCountMock).not.toHaveBeenCalled();
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expect(result).toBe(sessionEntry);
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});
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});

src/auto-reply/reply/agent-runner-memory.ts

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@@ -758,6 +758,13 @@ export async function runPreflightCompactionIfNeeded(params: {
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if (params.isHeartbeat || isCli) {
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return entry ?? params.sessionEntry;
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}
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// `compaction.preflight.enabled: false` short-circuits the budget-triggered
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// preflight path entirely; subsequent turns then rely on overflow recovery,
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// which already honors `compaction.timeoutSeconds` (~15min budget). The check
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// is `=== false` so an unset key preserves the existing default-on behavior.
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if (params.cfg.agents?.defaults?.compaction?.preflight?.enabled === false) {
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return entry ?? params.sessionEntry;
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}
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if (
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followupUsesCodexRuntime({
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cfg: params.cfg,

src/config/schema.help.ts

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"User-prompt template used for the pre-compaction memory flush turn when generating memory candidates. Use this only when you need custom extraction instructions beyond the default memory flush behavior.",
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"agents.defaults.compaction.memoryFlush.systemPrompt":
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"System-prompt override for the pre-compaction memory flush turn to control extraction style and safety constraints. Use carefully so custom instructions do not reduce memory quality or leak sensitive context.",
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"agents.defaults.compaction.preflight":
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"Preflight (budget-triggered) compaction gate. Disable to skip the pre-turn threshold check entirely and let every turn fall through to overflow recovery (which honors `compaction.timeoutSeconds`).",
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"agents.defaults.compaction.preflight.enabled":
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"Enable preflight (budget-triggered) compaction. Default: true. Set false to skip preflight compaction; subsequent turns then rely on overflow recovery, which has its own 15-minute budget and is the only path that honors `compaction.timeoutSeconds` without being capped by the ~60s reply lifecycle.",
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"agents.defaults.runRetries":
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"Outer run loop retry iteration boundaries for the embedded OpenClaw runner to prevent infinite execution loops during failure recovery.",
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"agents.defaults.runRetries.base":

src/config/schema.labels.ts

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"Compaction Memory Flush Transcript Size Threshold",
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"agents.defaults.compaction.memoryFlush.prompt": "Compaction Memory Flush Prompt",
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"agents.defaults.compaction.memoryFlush.systemPrompt": "Compaction Memory Flush System Prompt",
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"agents.defaults.compaction.preflight": "Compaction Preflight",
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"agents.defaults.compaction.preflight.enabled": "Compaction Preflight Enabled",
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"agents.defaults.runRetries": "Run Retries",
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"agents.defaults.runRetries.base": "Run Retries Base",
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"agents.defaults.runRetries.perProfile": "Run Retries Per Profile",

src/config/types.agent-defaults.ts

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* Default: false (silent by default).
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*/
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notifyUser?: boolean;
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/**
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* Preflight (budget-triggered) compaction gate. When disabled, the pre-turn
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* threshold check in `runPreflightCompactionIfNeeded` short-circuits to the
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* existing session entry; subsequent turns fall through to overflow recovery
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* (which already honors `compaction.timeoutSeconds`).
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*/
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preflight?: AgentCompactionPreflightConfig;
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};
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export type AgentCompactionPreflightConfig = {
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/** Enable preflight (budget-triggered) compaction. Default: true. */
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enabled?: boolean;
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};
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export type AgentCompactionMemoryFlushConfig = {

src/config/zod-schema.agent-defaults.ts

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truncateAfterCompaction: z.boolean().optional(),
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maxActiveTranscriptBytes: NonNegativeByteSizeSchema.optional(),
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notifyUser: z.boolean().optional(),
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preflight: z
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.object({
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enabled: z.boolean().optional(),
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})
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.strict()
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.optional(),
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})
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.strict()
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.optional(),

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