diff --git a/AGENTS.md b/AGENTS.md
index 74e585e..98578ca 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -33,7 +33,7 @@ Standard dev commands are in `package.json` scripts and `README.md`. Key ones:
 - **Gateway startup**: When running `pnpm dev`, the OpenClaw Gateway process starts automatically on port 18789. It takes ~10-30 seconds to become ready. Gateway readiness is not required for UI development—the app functions without it (shows "connecting" state).
 - **No database**: The app uses `electron-store` (JSON files) and OS keychain. No database setup is needed.
 - **AI Provider keys**: Actual AI chat requires at least one provider API key configured via Settings > AI Providers. The app is fully navigable and testable without keys.
-- **Token usage history implementation**: Dashboard token usage history is not parsed from console logs. It reads OpenClaw session transcript `.jsonl` files under the local OpenClaw config directory, scans both configured agents and any runtime agent directories found on disk, and treats normal, `.deleted.jsonl`, and `.jsonl.reset.*` transcripts as valid history sources. It extracts assistant/tool usage records with `message.usage` and aggregates fields such as input/output/cache/total tokens and cost from those structured records.
+- **Token usage history implementation**: Dashboard token usage history is not parsed from console logs. It reads OpenClaw session transcript `.jsonl` files under the local OpenClaw config directory, scans both configured agents and any runtime agent directories found on disk, and treats normal, `.deleted.jsonl`, and `.jsonl.reset.*` transcripts as valid history sources. It extracts assistant/tool usage records with `message.usage` and aggregates fields such as input/output/cache/total tokens and cost from those structured records. Note: "Delete conversation" in the sidebar is a hard delete — the Main process unlinks `<id>.jsonl` plus any leftover `<id>.deleted.jsonl` and `<id>.jsonl.reset.*` siblings, *and* OpenClaw's trajectory artefacts (`<id>.trajectory.jsonl` flight recorder + `<id>.trajectory-path.json` pointer); when the pointer references a runtime file outside the agent's `sessions/` folder (the `OPENCLAW_TRAJECTORY_DIR` override), that off-disk file is unlinked too. Deleted conversations stop contributing to this chart — use a fresh session if you want history retained.
 - **Models page aggregation**: The 7-day/30-day filters are relative rolling windows, not calendar-month buckets. When grouped by time, the chart should keep all day buckets in the selected window; only model grouping is intentionally capped to the top entries.
 - **OpenClaw Doctor in UI**: In Settings > Advanced > Developer, the app exposes both `Run Doctor` (`openclaw doctor --json`) and `Run Doctor Fix` (`openclaw doctor --fix --yes --non-interactive`) through the host-api. Renderer code should call the host route, not spawn CLI processes directly.
 - **UI change validation**: Any user-visible UI change should include or update an Electron E2E spec in the same PR so the interaction is covered by Playwright.
diff --git a/electron/api/routes/sessions.ts b/electron/api/routes/sessions.ts
index 0ef4787..bdd92aa 100644
--- a/electron/api/routes/sessions.ts
+++ b/electron/api/routes/sessions.ts
@@ -1,6 +1,12 @@
 import type { IncomingMessage, ServerResponse } from 'http';
 import { join } from 'node:path';
 import { getOpenClawConfigDir } from '../../utils/paths';
+import {
+  removeSessionEntry,
+  resolveSessionTranscriptPath,
+  sweepSessionArtefacts,
+} from '../../utils/session-files';
+import { logger } from '../../utils/logger';
 import type { HostApiContext } from '../context';
 import { parseJsonBody, sendJson } from '../route-utils';
 
@@ -49,6 +55,13 @@ export async function handleSessionRoutes(
     return true;
   }
 
+  // POST /api/sessions/delete — HTTP mirror of the `session:delete` IPC.
+  // Both surfaces share electron/utils/session-files.ts so they sweep the
+  // same set of artefacts: the live transcript, legacy `.deleted.jsonl`,
+  // `.jsonl.reset.*` snapshots, the trajectory sidecar pair
+  // (`<id>.trajectory.jsonl` + `<id>.trajectory-path.json`) and — when the
+  // pointer points outside sessions/ (the OPENCLAW_TRAJECTORY_DIR case) —
+  // the off-disk runtime trajectory it references.
   if (url.pathname === '/api/sessions/delete' && req.method === 'POST') {
     try {
       const body = await parseJsonBody<{ sessionKey: string }>(req);
@@ -63,66 +76,39 @@ export async function handleSessionRoutes(
         return true;
       }
       const agentId = parts[1];
+      // Defence-in-depth: agentId becomes a path segment under
+      // ~/.openclaw/agents/. The sibling /api/sessions/transcript route
+      // applies the same check to its sessionId; mirror it here so a
+      // malformed key can never steer the unlink loop into another folder.
+      if (!SAFE_SESSION_SEGMENT.test(agentId)) {
+        sendJson(res, 400, { success: false, error: `Invalid agentId: ${agentId}` });
+        return true;
+      }
       const sessionsDir = join(getOpenClawConfigDir(), 'agents', agentId, 'sessions');
       const sessionsJsonPath = join(sessionsDir, 'sessions.json');
       const fsP = await import('node:fs/promises');
       const raw = await fsP.readFile(sessionsJsonPath, 'utf8');
       const sessionsJson = JSON.parse(raw) as Record<string, unknown>;
 
-      let uuidFileName: string | undefined;
-      let resolvedSrcPath: string | undefined;
-      if (Array.isArray(sessionsJson.sessions)) {
-        const entry = (sessionsJson.sessions as Array<Record<string, unknown>>)
-          .find((s) => s.key === sessionKey || s.sessionKey === sessionKey);
-        if (entry) {
-          uuidFileName = (entry.file ?? entry.fileName ?? entry.path) as string | undefined;
-          if (!uuidFileName && typeof entry.id === 'string') {
-            uuidFileName = `${entry.id}.jsonl`;
-          }
+      const resolution = resolveSessionTranscriptPath(sessionsJson, sessionsDir, sessionKey);
+      if (!resolution.ok) {
+        if (resolution.failure.kind === 'not-found') {
+          sendJson(res, 404, { success: false, error: `Cannot resolve file for session: ${sessionKey}` });
+        } else {
+          logger.warn(`[api/sessions/delete] Refusing out-of-scope path for "${sessionKey}": ${resolution.failure.resolvedPath}`);
+          sendJson(res, 400, { success: false, error: `Resolved session path is outside the agent sessions dir: ${resolution.failure.resolvedPath}` });
         }
-      }
-      if (!uuidFileName && sessionsJson[sessionKey] != null) {
-        const val = sessionsJson[sessionKey];
-        if (typeof val === 'string') {
-          uuidFileName = val;
-        } else if (typeof val === 'object' && val !== null) {
-          const entry = val as Record<string, unknown>;
-          const absFile = (entry.sessionFile ?? entry.file ?? entry.fileName ?? entry.path) as string | undefined;
-          if (absFile) {
-            if (absFile.startsWith('/') || absFile.match(/^[A-Za-z]:\\/)) {
-              resolvedSrcPath = absFile;
-            } else {
-              uuidFileName = absFile;
-            }
-          } else {
-            const uuidVal = (entry.id ?? entry.sessionId) as string | undefined;
-            if (uuidVal) uuidFileName = uuidVal.endsWith('.jsonl') ? uuidVal : `${uuidVal}.jsonl`;
-          }
-        }
-      }
-      if (!uuidFileName && !resolvedSrcPath) {
-        sendJson(res, 404, { success: false, error: `Cannot resolve file for session: ${sessionKey}` });
         return true;
       }
-      if (!resolvedSrcPath) {
-        if (!uuidFileName!.endsWith('.jsonl')) uuidFileName = `${uuidFileName}.jsonl`;
-        resolvedSrcPath = join(sessionsDir, uuidFileName!);
-      }
-      const dstPath = resolvedSrcPath.replace(/\.jsonl$/, '.deleted.jsonl');
-      try {
-        await fsP.access(resolvedSrcPath);
-        await fsP.rename(resolvedSrcPath, dstPath);
-      } catch {
-        // Non-fatal; still try to update sessions.json.
+
+      const sweep = await sweepSessionArtefacts(resolution.sessionsDirAbs, resolution.baseId);
+      for (const { path: failedPath, error } of sweep.errors) {
+        logger.warn(`[api/sessions/delete] Failed to unlink ${failedPath}: ${String(error)}`);
       }
+
       const raw2 = await fsP.readFile(sessionsJsonPath, 'utf8');
       const json2 = JSON.parse(raw2) as Record<string, unknown>;
-      if (Array.isArray(json2.sessions)) {
-        json2.sessions = (json2.sessions as Array<Record<string, unknown>>)
-          .filter((s) => s.key !== sessionKey && s.sessionKey !== sessionKey);
-      } else if (json2[sessionKey]) {
-        delete json2[sessionKey];
-      }
+      removeSessionEntry(json2, sessionKey);
       await fsP.writeFile(sessionsJsonPath, JSON.stringify(json2, null, 2), 'utf8');
       sendJson(res, 200, { success: true });
     } catch (error) {
diff --git a/electron/main/ipc-handlers.ts b/electron/main/ipc-handlers.ts
index 4edb4eb..8b8e0ec 100644
--- a/electron/main/ipc-handlers.ts
+++ b/electron/main/ipc-handlers.ts
@@ -24,6 +24,11 @@ import { buildOpenClawControlUiUrl } from '../utils/openclaw-control-ui';
 import { logger } from '../utils/logger';
 import { resolveAgentIdFromChannel } from '../utils/agent-config';
 import { resolveAccountIdFromSessionHistory } from '../utils/session-util';
+import {
+  removeSessionEntry,
+  resolveSessionTranscriptPath,
+  sweepSessionArtefacts,
+} from '../utils/session-files';
 import {
   saveChannelConfig,
   getChannelConfig,
@@ -2586,11 +2591,31 @@ async function resolveOutgoingMediaUrl(
 /**
  * Session IPC handlers
  *
- * Performs a soft-delete of a session's JSONL transcript on disk.
+ * Performs a HARD delete of a session's JSONL transcript on disk.
  * sessionKey format: "agent:<agentId>:<suffix>" — e.g. "agent:main:session-1234567890".
- * The JSONL file lives at: ~/.openclaw/agents/<agentId>/sessions/<suffix>.jsonl
- * Renaming to <suffix>.deleted.jsonl hides it from sessions.list.
+ * The JSONL file lives at: ~/.openclaw/agents/<agentId>/sessions/<id>.jsonl
+ * (where <id> is typically a UUID resolved via sessions.json).
+ *
+ * For each deleted session we unlink every file that belongs to its on-disk id:
+ *   - <id>.jsonl                — the live transcript
+ *   - <id>.deleted.jsonl        — leftovers from earlier soft-delete releases
+ *   - <id>.jsonl.reset.*        — historical snapshots produced by sessions.reset
+ *   - <id>.trajectory.jsonl     — OpenClaw runtime "flight recorder" sidecar
+ *   - <id>.trajectory-path.json — pointer to the runtime trajectory; if it
+ *                                 points outside the sessions/ folder
+ *                                 (OPENCLAW_TRAJECTORY_DIR override) the
+ *                                 referenced file is unlinked too.
+ *
+ * The session entry is also removed from sessions.json so sessions.list stops
+ * surfacing it. Token-usage history reported by the Dashboard reads the same
+ * transcripts, so deleted conversations stop contributing to the chart.
+ *
+ * Path resolution and the sibling sweep are shared with the HTTP mirror at
+ * `electron/api/routes/sessions.ts` via `electron/utils/session-files.ts`,
+ * so both surfaces unlink the same set of files for a given session id.
  */
+const SAFE_AGENT_ID = /^[A-Za-z0-9][A-Za-z0-9_-]*$/;
+
 function registerSessionHandlers(): void {
   ipcMain.handle('session:delete', async (_, sessionKey: string) => {
     try {
@@ -2604,6 +2629,13 @@ function registerSessionHandlers(): void {
       }
 
       const agentId = parts[1];
+      // Defence-in-depth: agentId becomes a path segment under
+      // ~/.openclaw/agents/.  Reject anything that could escape that root
+      // (".." segments, slashes, NULs, etc.) before touching the FS.
+      if (!SAFE_AGENT_ID.test(agentId)) {
+        return { success: false, error: `Invalid agentId: ${agentId}` };
+      }
+
       const openclawConfigDir = getOpenClawConfigDir();
       const sessionsDir = join(openclawConfigDir, 'agents', agentId, 'sessions');
       const sessionsJsonPath = join(sessionsDir, 'sessions.json');
@@ -2623,94 +2655,41 @@ function registerSessionHandlers(): void {
         return { success: false, error: `Could not read sessions.json: ${String(e)}` };
       }
 
-      // sessions.json structure: try common shapes used by OpenClaw Gateway:
-      //   Shape A (array):  { sessions: [{ key, file, ... }] }
-      //   Shape B (object): { [sessionKey]: { file, ... } }
-      //   Shape C (array):  { sessions: [{ key, id, ... }] }  — id is the UUID
-      let uuidFileName: string | undefined;
-
-      // Shape A / C — array under "sessions" key
-      if (Array.isArray(sessionsJson.sessions)) {
-        const entry = (sessionsJson.sessions as Array<Record<string, unknown>>)
-          .find((s) => s.key === sessionKey || s.sessionKey === sessionKey);
-        if (entry) {
-          // Could be "file", "fileName", "id" + ".jsonl", or "path"
-          uuidFileName = (entry.file ?? entry.fileName ?? entry.path) as string | undefined;
-          if (!uuidFileName && typeof entry.id === 'string') {
-            uuidFileName = `${entry.id}.jsonl`;
-          }
+      const resolution = resolveSessionTranscriptPath(sessionsJson, sessionsDir, sessionKey);
+      if (!resolution.ok) {
+        if (resolution.failure.kind === 'not-found') {
+          const rawVal = sessionsJson[sessionKey];
+          logger.warn(`[session:delete] Cannot resolve file for "${sessionKey}". Raw value: ${JSON.stringify(rawVal)}`);
+          return { success: false, error: `Cannot resolve file for session: ${sessionKey}` };
         }
+        logger.warn(`[session:delete] Refusing to delete out-of-scope path for "${sessionKey}": ${resolution.failure.resolvedPath}`);
+        return { success: false, error: `Resolved session path is outside the agent sessions dir: ${resolution.failure.resolvedPath}` };
       }
 
-      // Shape B — flat object keyed by sessionKey; value may be a string or an object.
-      // Actual Gateway format: { sessionFile: "/abs/path/uuid.jsonl", sessionId: "uuid", ... }
-      let resolvedSrcPath: string | undefined;
-
-      if (!uuidFileName && sessionsJson[sessionKey] != null) {
-        const val = sessionsJson[sessionKey];
-        if (typeof val === 'string') {
-          uuidFileName = val;
-        } else if (typeof val === 'object' && val !== null) {
-          const entry = val as Record<string, unknown>;
-          // Priority: absolute sessionFile path > relative file/fileName/path > id/sessionId as UUID
-          const absFile = (entry.sessionFile ?? entry.file ?? entry.fileName ?? entry.path) as string | undefined;
-          if (absFile) {
-            if (absFile.startsWith('/') || absFile.match(/^[A-Za-z]:\\/)) {
-              // Absolute path — use directly
-              resolvedSrcPath = absFile;
-            } else {
-              uuidFileName = absFile;
-            }
-          } else {
-            // Fall back to UUID fields
-            const uuidVal = (entry.id ?? entry.sessionId) as string | undefined;
-            if (uuidVal) uuidFileName = uuidVal.endsWith('.jsonl') ? uuidVal : `${uuidVal}.jsonl`;
-          }
-        }
-      }
-
-      if (!uuidFileName && !resolvedSrcPath) {
-        const rawVal = sessionsJson[sessionKey];
-        logger.warn(`[session:delete] Cannot resolve file for "${sessionKey}". Raw value: ${JSON.stringify(rawVal)}`);
-        return { success: false, error: `Cannot resolve file for session: ${sessionKey}` };
-      }
-
-      // Normalise: if we got a relative filename, resolve it against sessionsDir
-      if (!resolvedSrcPath) {
-        if (!uuidFileName!.endsWith('.jsonl')) uuidFileName = `${uuidFileName}.jsonl`;
-        resolvedSrcPath = join(sessionsDir, uuidFileName!);
-      }
-
-      const dstPath = resolvedSrcPath.replace(/\.jsonl$/, '.deleted.jsonl');
+      const { resolvedSrcPath, sessionsDirAbs, baseId } = resolution;
       logger.info(`[session:delete] file: ${resolvedSrcPath}`);
 
-      // ── Step 2: rename the JSONL file ──
-      try {
-        await fsP.access(resolvedSrcPath);
-        await fsP.rename(resolvedSrcPath, dstPath);
-        logger.info(`[session:delete] Renamed ${resolvedSrcPath} → ${dstPath}`);
-      } catch (e) {
-        logger.warn(`[session:delete] Could not rename file: ${String(e)}`);
+      // ── Step 2: hard-delete the JSONL transcript and its siblings ──
+      const sweep = await sweepSessionArtefacts(sessionsDirAbs, baseId);
+      for (const removedPath of sweep.removed) {
+        logger.info(`[session:delete] Unlinked ${removedPath}`);
       }
+      for (const { path: failedPath, error } of sweep.errors) {
+        logger.warn(`[session:delete] Failed to unlink ${failedPath}: ${String(error)}`);
+      }
+      logger.info(`[session:delete] Hard-deleted ${sweep.removed.length} file(s) for ${baseId}`);
 
       // ── Step 3: remove the entry from sessions.json ──
       try {
         // Re-read to avoid race conditions
         const raw2 = await fsP.readFile(sessionsJsonPath, 'utf8');
         const json2 = JSON.parse(raw2) as Record<string, unknown>;
-
-        if (Array.isArray(json2.sessions)) {
-          json2.sessions = (json2.sessions as Array<Record<string, unknown>>)
-            .filter((s) => s.key !== sessionKey && s.sessionKey !== sessionKey);
-        } else if (json2[sessionKey]) {
-          delete json2[sessionKey];
-        }
-
+        removeSessionEntry(json2, sessionKey);
         await fsP.writeFile(sessionsJsonPath, JSON.stringify(json2, null, 2), 'utf8');
         logger.info(`[session:delete] Removed "${sessionKey}" from sessions.json`);
       } catch (e) {
         logger.warn(`[session:delete] Could not update sessions.json: ${String(e)}`);
-        // Non-fatal — JSONL rename already done
+        // Non-fatal — transcript files were already unlinked.
       }
 
       return { success: true };
diff --git a/electron/utils/session-files.ts b/electron/utils/session-files.ts
new file mode 100644
index 0000000..87e17f3
--- /dev/null
+++ b/electron/utils/session-files.ts
@@ -0,0 +1,271 @@
+/**
+ * Session file helpers
+ *
+ * Shared between the Main IPC `session:delete` handler and the HTTP mirror
+ * `POST /api/sessions/delete`. Both surfaces must agree on:
+ *
+ *   1. how a `sessionKey` (e.g. `agent:main:session-1234`) is resolved to an
+ *      on-disk transcript path via `sessions.json`, and
+ *   2. which sibling artefacts are swept when the user hard-deletes a
+ *      conversation:
+ *        - `<baseId>.jsonl`               the live transcript
+ *        - `<baseId>.deleted.jsonl`       legacy soft-delete leftover
+ *        - `<baseId>.jsonl.reset.*`       reset snapshots from sessions.reset
+ *        - `<baseId>.trajectory.jsonl`    OpenClaw runtime "flight recorder"
+ *                                         (default location, beside session)
+ *        - `<baseId>.trajectory-path.json` pointer sidecar; when present we
+ *                                         follow `runtimeFile` so the actual
+ *                                         trajectory still gets unlinked even
+ *                                         if `OPENCLAW_TRAJECTORY_DIR` moved
+ *                                         it out of the sessions/ folder
+ *
+ * The helper enforces that the resolved session path lives inside the
+ * agent's `sessions/` directory so a corrupt or malicious `sessions.json`
+ * can never steer the unlink loop into an unrelated folder. The pointer-
+ * follow path is the only deliberate exception: it walks to whatever
+ * `runtimeFile` says (defended by schema + extension checks) so ClawX can
+ * cooperate with OpenClaw's documented `OPENCLAW_TRAJECTORY_DIR` override.
+ */
+
+import { promises as fsP } from 'node:fs';
+import path from 'node:path';
+
+export type SessionResolutionFailure =
+  | { kind: 'not-found' }
+  | { kind: 'path-outside-scope'; resolvedPath: string };
+
+export type SessionResolutionResult =
+  | { ok: true; resolvedSrcPath: string; sessionsDirAbs: string; baseId: string }
+  | { ok: false; failure: SessionResolutionFailure };
+
+/**
+ * `path.isAbsolute` only respects the *current* platform's rules. OpenClaw
+ * may be running in a context (or have been migrated from a profile) where
+ * the on-disk `sessionFile` uses Windows-style backslash paths, Windows
+ * forward-slash paths (`C:/...`) or POSIX paths. Accepting all three keeps
+ * the IPC handler portable across Win32 + macOS + Linux installs.
+ */
+function isAnyAbsolute(candidate: string): boolean {
+  return path.isAbsolute(candidate) || path.win32.isAbsolute(candidate);
+}
+
+/**
+ * Resolve the absolute on-disk transcript path for `sessionKey` from a parsed
+ * `sessions.json` blob. Returns `{ ok: false, failure: 'not-found' }` when no
+ * matching entry is found and `{ ok: false, failure: 'path-outside-scope' }`
+ * when the resolved path escapes `sessionsDir` (defence-in-depth).
+ *
+ * Supports the three sessions.json shapes observed in the wild:
+ *   A) `{ sessions: [{ key, file, ... }] }`           (array, file field)
+ *   B) `{ [sessionKey]: { sessionFile|file|...|id } }` (object-keyed, current)
+ *   C) `{ sessions: [{ key, id, ... }] }`             (array, id field only)
+ */
+export function resolveSessionTranscriptPath(
+  sessionsJson: Record<string, unknown>,
+  sessionsDir: string,
+  sessionKey: string,
+): SessionResolutionResult {
+  let uuidFileName: string | undefined;
+  let resolvedSrcPath: string | undefined;
+
+  if (Array.isArray(sessionsJson.sessions)) {
+    const entry = (sessionsJson.sessions as Array<Record<string, unknown>>)
+      .find((s) => s.key === sessionKey || s.sessionKey === sessionKey);
+    if (entry) {
+      uuidFileName = (entry.file ?? entry.fileName ?? entry.path) as string | undefined;
+      if (!uuidFileName && typeof entry.id === 'string') {
+        uuidFileName = `${entry.id}.jsonl`;
+      }
+    }
+  }
+
+  if (!uuidFileName && sessionsJson[sessionKey] != null) {
+    const val = sessionsJson[sessionKey];
+    if (typeof val === 'string') {
+      uuidFileName = val;
+    } else if (typeof val === 'object' && val !== null) {
+      const entry = val as Record<string, unknown>;
+      const absFile = (entry.sessionFile ?? entry.file ?? entry.fileName ?? entry.path) as string | undefined;
+      if (absFile) {
+        if (isAnyAbsolute(absFile)) {
+          resolvedSrcPath = absFile;
+        } else {
+          uuidFileName = absFile;
+        }
+      } else {
+        const uuidVal = (entry.id ?? entry.sessionId) as string | undefined;
+        if (uuidVal) uuidFileName = uuidVal.endsWith('.jsonl') ? uuidVal : `${uuidVal}.jsonl`;
+      }
+    }
+  }
+
+  if (!uuidFileName && !resolvedSrcPath) {
+    return { ok: false, failure: { kind: 'not-found' } };
+  }
+
+  if (!resolvedSrcPath) {
+    if (!uuidFileName!.endsWith('.jsonl')) uuidFileName = `${uuidFileName}.jsonl`;
+    resolvedSrcPath = path.join(sessionsDir, uuidFileName!);
+  }
+
+  const sessionsDirAbs = path.dirname(resolvedSrcPath);
+  // sessionsDir is always built from `getOpenClawConfigDir()` + the validated
+  // agentId, so anything that doesn't resolve underneath it is suspect. We
+  // refuse rather than try to "normalise" the entry — the worst case for the
+  // user is that the sidebar entry stops listing it; the worst case if we
+  // proceeded is `unlink`s in someone else's directory.
+  const rel = path.relative(sessionsDir, sessionsDirAbs);
+  if (rel.startsWith('..') || path.isAbsolute(rel)) {
+    return { ok: false, failure: { kind: 'path-outside-scope', resolvedPath: resolvedSrcPath } };
+  }
+
+  const baseId = path.basename(resolvedSrcPath).replace(/\.jsonl$/, '');
+  return { ok: true, resolvedSrcPath, sessionsDirAbs, baseId };
+}
+
+export interface SweepResult {
+  removed: string[];
+  errors: Array<{ path: string; error: NodeJS.ErrnoException }>;
+}
+
+/**
+ * Schema marker written by OpenClaw's `writeTrajectoryPointerBestEffort`.
+ * Any pointer file that doesn't carry this exact `traceSchema` is treated
+ * as untrusted and ignored — we only follow pointers we know OpenClaw
+ * authored.
+ */
+const TRAJECTORY_POINTER_SCHEMA = 'openclaw-trajectory-pointer';
+
+/**
+ * Best-effort: parse the trajectory pointer sidecar and return the off-disk
+ * runtime file path it points at. Returns null when the pointer is absent,
+ * malformed, missing the openclaw-trajectory-pointer schema, or its
+ * `runtimeFile` is not an absolute `.jsonl` path. Any of those conditions
+ * means we silently skip the off-disk unlink — the local sidecar sweep
+ * still runs and the worst case is one orphaned file the user can clean up
+ * manually.
+ */
+async function readTrajectoryRuntimeFile(pointerPath: string): Promise<string | null> {
+  let raw: string;
+  try {
+    raw = await fsP.readFile(pointerPath, 'utf8');
+  } catch {
+    return null;
+  }
+  let parsed: unknown;
+  try {
+    parsed = JSON.parse(raw);
+  } catch {
+    return null;
+  }
+  if (!parsed || typeof parsed !== 'object') return null;
+  const obj = parsed as Record<string, unknown>;
+  if (obj.traceSchema !== TRAJECTORY_POINTER_SCHEMA) return null;
+  const runtimeFile = obj.runtimeFile;
+  if (typeof runtimeFile !== 'string' || runtimeFile.length === 0) return null;
+  // OpenClaw always writes a `.jsonl` path; refusing anything else keeps us
+  // from being weaponised into deleting (say) `/etc/passwd` if a hostile
+  // sessions.json/pointer combination ever showed up on disk.
+  if (!runtimeFile.endsWith('.jsonl')) return null;
+  if (!path.isAbsolute(runtimeFile) && !path.win32.isAbsolute(runtimeFile)) return null;
+  return runtimeFile;
+}
+
+/**
+ * Hard-delete every artefact that belongs to `baseId` inside
+ * `sessionsDirAbs`. ENOENT is tolerated for both the directory itself and
+ * each individual file — by the time the sweep runs we've already committed
+ * to the deletion, so missing files just mean a previous sweep got there
+ * first. Other errors are accumulated so the caller can log/surface them.
+ *
+ * In addition to the local sidecars (`.jsonl`, `.deleted.jsonl`,
+ * `.jsonl.reset.*`, `.trajectory.jsonl`, `.trajectory-path.json`), the
+ * sweep follows the `.trajectory-path.json` pointer when it exists and
+ * unlinks the off-disk runtime file at `runtimeFile`. This keeps ClawX in
+ * sync with OpenClaw's `OPENCLAW_TRAJECTORY_DIR` override (where the
+ * actual trajectory is stored outside the sessions/ folder).
+ */
+export async function sweepSessionArtefacts(
+  sessionsDirAbs: string,
+  baseId: string,
+): Promise<SweepResult> {
+  const result: SweepResult = { removed: [], errors: [] };
+
+  let dirEntries: string[];
+  try {
+    dirEntries = await fsP.readdir(sessionsDirAbs);
+  } catch (err) {
+    const code = (err as NodeJS.ErrnoException).code;
+    if (code === 'ENOENT') return result;
+    result.errors.push({ path: sessionsDirAbs, error: err as NodeJS.ErrnoException });
+    return result;
+  }
+
+  const pointerName = `${baseId}.trajectory-path.json`;
+  const targets = dirEntries.filter((name) =>
+    name === `${baseId}.jsonl`
+    || name === `${baseId}.deleted.jsonl`
+    || name === `${baseId}.trajectory.jsonl`
+    || name === pointerName
+    || name.startsWith(`${baseId}.jsonl.reset.`),
+  );
+
+  // Follow the pointer FIRST so the off-disk runtime file (lives outside
+  // sessionsDirAbs when OPENCLAW_TRAJECTORY_DIR is set) gets unlinked
+  // before we delete its only on-disk reference. If the pointer is gone,
+  // malformed, or carries an in-sessions-dir path, this is a no-op and the
+  // standard local sweep below covers everything.
+  if (targets.includes(pointerName)) {
+    const pointerPath = path.join(sessionsDirAbs, pointerName);
+    const runtimeFile = await readTrajectoryRuntimeFile(pointerPath);
+    if (runtimeFile) {
+      const absRuntime = path.resolve(runtimeFile);
+      const rel = path.relative(sessionsDirAbs, absRuntime);
+      // Only chase pointers that escape the sessions dir. Anything pointing
+      // back inside is already covered by the local-target sweep below
+      // (and would risk a double-unlink / double-error otherwise).
+      if (rel.startsWith('..') || path.isAbsolute(rel)) {
+        try {
+          await fsP.unlink(absRuntime);
+          result.removed.push(absRuntime);
+        } catch (err) {
+          const code = (err as NodeJS.ErrnoException).code;
+          if (code !== 'ENOENT') {
+            result.errors.push({ path: absRuntime, error: err as NodeJS.ErrnoException });
+          }
+        }
+      }
+    }
+  }
+
+  await Promise.all(targets.map(async (name) => {
+    const target = path.join(sessionsDirAbs, name);
+    try {
+      await fsP.unlink(target);
+      result.removed.push(target);
+    } catch (err) {
+      const code = (err as NodeJS.ErrnoException).code;
+      if (code === 'ENOENT') return;
+      result.errors.push({ path: target, error: err as NodeJS.ErrnoException });
+    }
+  }));
+
+  return result;
+}
+
+/**
+ * Remove `sessionKey` from a parsed sessions.json object (mutates in place).
+ * Handles both the array-shape (`{ sessions: [...] }`) and the object-keyed
+ * shape so the IPC handler and HTTP route share one rewrite path.
+ */
+export function removeSessionEntry(
+  sessionsJson: Record<string, unknown>,
+  sessionKey: string,
+): void {
+  if (Array.isArray(sessionsJson.sessions)) {
+    sessionsJson.sessions = (sessionsJson.sessions as Array<Record<string, unknown>>)
+      .filter((s) => s.key !== sessionKey && s.sessionKey !== sessionKey);
+  } else if (sessionsJson[sessionKey]) {
+    delete sessionsJson[sessionKey];
+  }
+}
diff --git a/harness/specs/tasks/hard-delete-session-jsonl.md b/harness/specs/tasks/hard-delete-session-jsonl.md
new file mode 100644
index 0000000..78499c4
--- /dev/null
+++ b/harness/specs/tasks/hard-delete-session-jsonl.md
@@ -0,0 +1,71 @@
+---
+id: hard-delete-session-jsonl
+title: Hard-delete session JSONL on conversation delete
+scenario: gateway-backend-communication
+taskType: runtime-bridge
+intent: Remove the on-disk session transcript (and its sibling artefacts) when the user deletes a conversation, instead of soft-deleting it via rename.
+touchedAreas:
+  - electron/main/ipc-handlers.ts
+  - electron/api/routes/sessions.ts
+  - electron/utils/session-files.ts
+  - src/stores/chat/session-actions.ts
+  - src/stores/chat.ts
+  - tests/unit/session-delete-route.test.ts
+  - harness/specs/tasks/hard-delete-session-jsonl.md
+  - AGENTS.md
+expectedUserBehavior:
+  - Confirming "Delete" in the sidebar conversation menu removes <id>.jsonl, <id>.deleted.jsonl and any <id>.jsonl.reset.* siblings from the agent's sessions folder.
+  - OpenClaw's trajectory artefacts for the same session id are removed too — both the local <id>.trajectory.jsonl flight recorder and the <id>.trajectory-path.json pointer sidecar.
+  - When the pointer's runtimeFile points outside the sessions/ folder (the OPENCLAW_TRAJECTORY_DIR override), that off-disk runtime file is also unlinked so no orphan trajectory remains anywhere on disk.
+  - The session entry is removed from sessions.json so OpenClaw sessions.list stops returning it.
+  - The sidebar list, sessionLabels and sessionLastActivity for the deleted key are cleared in the renderer store.
+  - Token usage history reported by the Dashboard stops including the deleted session.
+requiredProfiles:
+  - fast
+  - comms
+requiredTests:
+  - tests/unit/session-delete-route.test.ts
+  - tests/unit/chat-session-actions.test.ts
+acceptance:
+  - Renderer continues to use src/lib/host-api.ts and src/lib/api-client.ts; no new direct ipcRenderer or Gateway HTTP calls.
+  - IPC channel name session:delete and HTTP route POST /api/sessions/delete are unchanged in shape.
+  - Both the IPC handler in electron/main/ipc-handlers.ts and the HTTP mirror in electron/api/routes/sessions.ts unlink the same set of files for a given session id, sharing electron/utils/session-files.ts so the disk contract cannot drift.
+  - The handler tolerates ENOENT (file already gone) and still updates sessions.json so the sidebar stops listing the entry.
+  - agentId from the sessionKey is validated against /^[A-Za-z0-9][A-Za-z0-9_-]*$/ in both surfaces and any sessionFile resolved to a path outside the agent sessions/ directory is refused (defence-in-depth against a corrupt sessions.json).
+  - Absolute-path detection accepts POSIX paths, Windows backslash paths (C:\...) and Windows forward-slash paths (C:/...) so the sweep works on every supported OS.
+  - The sweep also unlinks <id>.trajectory.jsonl and <id>.trajectory-path.json sidecars produced by OpenClaw's runtime trajectory writer.
+  - When <id>.trajectory-path.json carries the openclaw-trajectory-pointer schema and an absolute .jsonl runtimeFile that lives outside the sessions/ folder, the off-disk runtime trajectory is unlinked too (covers the OPENCLAW_TRAJECTORY_DIR override). Pointers with the wrong schema, a non-.jsonl runtimeFile, or a non-absolute runtimeFile are ignored and no extra files are touched.
+docs:
+  required: true
+---
+
+Conversation deletion in ClawX runs entirely on the Main process — the
+OpenClaw Gateway does not expose a `sessions.delete` RPC. Historically the
+operation was a soft delete: the live `<id>.jsonl` transcript was renamed to
+`<id>.deleted.jsonl` so `sessions.list` would skip it. This task replaces
+that rename with a true `unlink` plus a sibling sweep that also removes
+`<id>.deleted.jsonl` (legacy soft-delete leftovers) and `<id>.jsonl.reset.*`
+(reset snapshots produced by `sessions.reset`).
+
+Both backends (the IPC handler used by the refactored chat store and the
+HTTP route used by the legacy chat store) share the same disk contract via
+`electron/utils/session-files.ts`, which centralises:
+
+  - sessions.json entry resolution across the three observed shapes,
+  - cross-platform absolute-path detection (POSIX, Windows `C:\...` and
+    Windows `C:/...`) using `path.isAbsolute` + `path.win32.isAbsolute`,
+  - a defence-in-depth scope check that refuses any `sessionFile` whose
+    resolved directory escapes the agent's `sessions/` folder,
+  - the sibling sweep (`.jsonl`, `.deleted.jsonl`, `.jsonl.reset.*`,
+    `.trajectory.jsonl`, `.trajectory-path.json`) with ENOENT tolerance, and
+  - the trajectory pointer-follow that handles OpenClaw's
+    `OPENCLAW_TRAJECTORY_DIR` override: when the pointer is well-formed
+    (`traceSchema === "openclaw-trajectory-pointer"` and `runtimeFile` is
+    an absolute `.jsonl` outside sessions/), the off-disk runtime file is
+    unlinked too. Malformed or unsafe pointers are ignored.
+
+Renderer surface is untouched: the confirm dialog in `Sidebar.tsx`, the
+`useChatStore.deleteSession` API, and the host-api/api-client boundary all
+continue to work without changes. The only user-visible effect is that
+deleted conversations no longer leave hidden `.deleted.jsonl` files behind
+and no longer contribute to Dashboard token-usage history.
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index b01e426..a7ba201 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -290,7 +290,10 @@ export function Sidebar() {
         <Button
           variant="ghost"
           size="icon"
-          className="no-drag h-8 w-8 shrink-0 text-muted-foreground hover:bg-black/5 dark:hover:bg-white/10"
+          className={cn(
+            'no-drag h-8 w-8 shrink-0 rounded-lg text-foreground/80',
+            'hover:bg-black/5 hover:text-foreground/80 dark:hover:bg-white/5',
+          )}
           onClick={() => setSidebarCollapsed(!sidebarCollapsed)}
         >
           {sidebarCollapsed ? (
@@ -304,6 +307,7 @@ export function Sidebar() {
       {/* Navigation */}
       <nav className="flex flex-col gap-0 px-2">
         <button
+          type="button"
           data-testid="sidebar-new-chat"
           onClick={() => {
             const { messages } = useChatStore.getState();
@@ -311,8 +315,8 @@ export function Sidebar() {
             navigate('/');
           }}
           className={cn(
-            'sidebar-nav-text mb-1 flex w-full items-center gap-2 rounded-lg px-2.5 py-1.5 transition-colors',
-            'border border-transparent text-foreground/80 shadow-none hover:bg-black/5 hover:text-foreground dark:hover:bg-white/5',
+            'sidebar-nav-text flex items-center gap-2 rounded-lg px-2.5 py-1.5 transition-colors',
+            'hover:bg-black/5 dark:hover:bg-white/5 text-foreground/80',
             sidebarCollapsed && 'justify-center px-0',
           )}
         >
diff --git a/src/pages/Chat/ChatInput.tsx b/src/pages/Chat/ChatInput.tsx
index df37f4d..d9e4753 100644
--- a/src/pages/Chat/ChatInput.tsx
+++ b/src/pages/Chat/ChatInput.tsx
@@ -989,7 +989,7 @@ export function ChatInput({ onSend, onStop, disabled = false, sending = false, i
                     setSkillPickerOpen(false);
                     setModelPickerOpen((open) => !open);
                   }}
-                  disabled={sending || !currentAgent || !!switchingModelRef}
+                  disabled={inputDisabled || sending || !currentAgent || !!switchingModelRef}
                   title={t('composer.pickModel')}
                 >
                   {switchingModelRef ? (
diff --git a/src/stores/chat.ts b/src/stores/chat.ts
index 4d152a6..3b8a9f5 100644
--- a/src/stores/chat.ts
+++ b/src/stores/chat.ts
@@ -1676,16 +1676,17 @@ export const useChatStore = create<ChatState>((set, get) => ({
   //
   // NOTE: The OpenClaw Gateway does NOT expose a sessions.delete (or equivalent)
   // RPC — confirmed by inspecting client.ts, protocol.ts and the full codebase.
-  // Deletion is therefore a local-only UI operation: the session is removed from
-  // the sidebar list and its labels/activity maps are cleared.  The underlying
-  // JSONL history file on disk is intentionally left intact, consistent with the
-  // newSession() design that avoids sessions.reset to preserve history.
+  // Deletion is therefore performed locally: the renderer drops the session
+  // from the sidebar / labels / activity maps and the Main process hard-deletes
+  // the on-disk transcript so it stops appearing in sessions.list and stops
+  // contributing to the Dashboard token-usage history.
 
   deleteSession: async (key: string) => {
     clearCachedSessionHistory(key);
-    // Soft-delete the session's JSONL transcript on disk.
-    // The main process renames <suffix>.jsonl → <suffix>.deleted.jsonl so that
-    // sessions.list skips it automatically.
+    // Hard-delete the session's JSONL transcript on disk.
+    // The main process unlinks <id>.jsonl plus any leftover
+    // <id>.deleted.jsonl and <id>.jsonl.reset.* siblings, then removes the
+    // entry from sessions.json so sessions.list stops surfacing it.
     try {
       const result = await hostApiFetch<{
         success: boolean;
diff --git a/src/stores/chat/session-actions.ts b/src/stores/chat/session-actions.ts
index 9e994fe..bcc1f09 100644
--- a/src/stores/chat/session-actions.ts
+++ b/src/stores/chat/session-actions.ts
@@ -200,15 +200,16 @@ export function createSessionActions(
     //
     // NOTE: The OpenClaw Gateway does NOT expose a sessions.delete (or equivalent)
     // RPC — confirmed by inspecting client.ts, protocol.ts and the full codebase.
-    // Deletion is therefore a local-only UI operation: the session is removed from
-    // the sidebar list and its labels/activity maps are cleared.  The underlying
-    // JSONL history file on disk is intentionally left intact, consistent with the
-    // newSession() design that avoids sessions.reset to preserve history.
+    // Deletion is therefore performed locally: the renderer drops the session
+    // from the sidebar / labels / activity maps and the Main process hard-deletes
+    // the on-disk transcript so it stops appearing in sessions.list and stops
+    // contributing to the Dashboard token-usage history.
 
     deleteSession: async (key: string) => {
-      // Soft-delete the session's JSONL transcript on disk.
-      // The main process renames <suffix>.jsonl → <suffix>.deleted.jsonl so that
-      // sessions.list skips it automatically.
+      // Hard-delete the session's JSONL transcript on disk.
+      // The main process unlinks <id>.jsonl plus any leftover
+      // <id>.deleted.jsonl and <id>.jsonl.reset.* siblings, then removes the
+      // entry from sessions.json so sessions.list stops surfacing it.
       try {
         const result = await invokeIpc('session:delete', key) as {
           success: boolean;
diff --git a/tests/unit/chat-input.test.tsx b/tests/unit/chat-input.test.tsx
index a10e717..222dcc7 100644
--- a/tests/unit/chat-input.test.tsx
+++ b/tests/unit/chat-input.test.tsx
@@ -229,10 +229,45 @@ describe('ChatInput agent targeting', () => {
         channelTypes: [],
       },
     ];
+    agentsState.defaultModelRef = 'custom-aaaaaaaa/gpt-a';
+    const now = '2025-01-01T00:00:00.000Z';
+    providersState.accounts = [
+      {
+        id: 'aaaaaaaa',
+        vendorId: 'custom',
+        label: 'Alpha',
+        authMode: 'api_key',
+        baseUrl: 'http://127.0.0.1:1/v1',
+        model: 'custom-aaaaaaaa/gpt-a',
+        enabled: true,
+        isDefault: true,
+        createdAt: now,
+        updatedAt: now,
+      },
+      {
+        id: 'bbbbbbbb',
+        vendorId: 'custom',
+        label: 'Beta',
+        authMode: 'api_key',
+        baseUrl: 'http://127.0.0.1:2/v1',
+        model: 'custom-bbbbbbbb/gpt-b',
+        enabled: true,
+        isDefault: false,
+        createdAt: now,
+        updatedAt: now,
+      },
+    ];
+    providersState.statuses = [
+      { id: 'aaaaaaaa', name: 'Alpha', type: 'custom', hasKey: true, keyMasked: 'sk-***', enabled: true, createdAt: now, updatedAt: now },
+      { id: 'bbbbbbbb', name: 'Beta', type: 'custom', hasKey: true, keyMasked: 'sk-***', enabled: true, createdAt: now, updatedAt: now },
+    ];
+    providersState.defaultAccountId = 'aaaaaaaa';
 
     renderChatInput();
 
     expect(screen.getByTestId('chat-composer-input')).toBeDisabled();
+    expect(screen.getByTestId('chat-composer-skill')).toBeDisabled();
+    expect(screen.getByTestId('chat-model-picker-button')).toBeDisabled();
   });
 
   it('shows starting status while gateway is running but not yet ready', () => {
diff --git a/tests/unit/session-delete-route.test.ts b/tests/unit/session-delete-route.test.ts
new file mode 100644
index 0000000..6b383d5
--- /dev/null
+++ b/tests/unit/session-delete-route.test.ts
@@ -0,0 +1,454 @@
+/**
+ * Unit tests for the /api/sessions/delete HTTP route.
+ *
+ * The route hard-deletes a conversation's transcript on disk:
+ *   - <id>.jsonl              — the live transcript
+ *   - <id>.deleted.jsonl      — leftovers from earlier soft-delete releases
+ *   - <id>.jsonl.reset.*      — reset snapshots from sessions.reset
+ * It also removes the entry from sessions.json.
+ *
+ * These tests exercise the real `handleSessionRoutes` against a temp
+ * OpenClaw config directory so the FS contract is verified end-to-end.
+ */
+
+import { afterAll, beforeEach, describe, expect, it, vi } from 'vitest';
+import type { IncomingMessage, ServerResponse } from 'http';
+import { existsSync, mkdirSync, readFileSync, rmSync, writeFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { tmpdir } from 'node:os';
+
+const sendJsonMock = vi.fn();
+const parseJsonBodyMock = vi.fn();
+
+const testOpenClawConfigDir = join(tmpdir(), 'clawx-tests', 'session-delete-route-openclaw');
+
+vi.mock('@electron/api/route-utils', () => ({
+  parseJsonBody: (...args: unknown[]) => parseJsonBodyMock(...args),
+  sendJson: (...args: unknown[]) => sendJsonMock(...args),
+}));
+
+vi.mock('@electron/utils/paths', () => ({
+  getOpenClawConfigDir: () => testOpenClawConfigDir,
+  getOpenClawDir: () => testOpenClawConfigDir,
+  getOpenClawResolvedDir: () => testOpenClawConfigDir,
+}));
+
+const AGENT_ID = 'main';
+const SESSIONS_DIR = join(testOpenClawConfigDir, 'agents', AGENT_ID, 'sessions');
+const SESSIONS_JSON = join(SESSIONS_DIR, 'sessions.json');
+
+function seedSessionsDir(): void {
+  rmSync(testOpenClawConfigDir, { recursive: true, force: true });
+  mkdirSync(SESSIONS_DIR, { recursive: true });
+}
+
+function writeSessionsJson(payload: Record<string, unknown>): void {
+  writeFileSync(SESSIONS_JSON, JSON.stringify(payload, null, 2), 'utf8');
+}
+
+function makeReq(method = 'POST'): IncomingMessage {
+  return { method } as IncomingMessage;
+}
+
+function makeRes(): ServerResponse {
+  return {
+    setHeader: vi.fn(),
+    end: vi.fn(),
+  } as unknown as ServerResponse;
+}
+
+const DELETE_URL = new URL('http://127.0.0.1:13210/api/sessions/delete');
+const ctx = {} as never;
+
+describe('handleSessionRoutes — POST /api/sessions/delete', () => {
+  beforeEach(() => {
+    vi.resetAllMocks();
+    seedSessionsDir();
+  });
+
+  afterAll(() => {
+    rmSync(testOpenClawConfigDir, { recursive: true, force: true });
+  });
+
+  it('hard-deletes the live <id>.jsonl and clears the entry from sessions.json', async () => {
+    const sessionKey = 'agent:main:session-aaa';
+    const fileName = 'aaa-uuid.jsonl';
+    writeFileSync(join(SESSIONS_DIR, fileName), 'message\n', 'utf8');
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: join(SESSIONS_DIR, fileName), sessionId: 'aaa-uuid' },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    const handled = await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(handled).toBe(true);
+    expect(sendJsonMock).toHaveBeenCalledWith(expect.anything(), 200, { success: true });
+    expect(existsSync(join(SESSIONS_DIR, fileName))).toBe(false);
+    const updated = JSON.parse(readFileSync(SESSIONS_JSON, 'utf8'));
+    expect(updated[sessionKey]).toBeUndefined();
+  });
+
+  it('also removes a leftover <id>.deleted.jsonl from a prior soft-delete release', async () => {
+    const sessionKey = 'agent:main:session-bbb';
+    const baseId = 'bbb-uuid';
+    writeFileSync(join(SESSIONS_DIR, `${baseId}.jsonl`), '', 'utf8');
+    writeFileSync(join(SESSIONS_DIR, `${baseId}.deleted.jsonl`), '', 'utf8');
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: join(SESSIONS_DIR, `${baseId}.jsonl`), sessionId: baseId },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(existsSync(join(SESSIONS_DIR, `${baseId}.jsonl`))).toBe(false);
+    expect(existsSync(join(SESSIONS_DIR, `${baseId}.deleted.jsonl`))).toBe(false);
+  });
+
+  it('removes every <id>.jsonl.reset.* sibling that belongs to the same session id', async () => {
+    const sessionKey = 'agent:main:session-ccc';
+    const baseId = 'ccc-uuid';
+    const liveFile = join(SESSIONS_DIR, `${baseId}.jsonl`);
+    const reset1 = join(SESSIONS_DIR, `${baseId}.jsonl.reset.2026-04-01T00-00-00.000Z`);
+    const reset2 = join(SESSIONS_DIR, `${baseId}.jsonl.reset.2026-04-02T00-00-00.000Z`);
+    writeFileSync(liveFile, '', 'utf8');
+    writeFileSync(reset1, '', 'utf8');
+    writeFileSync(reset2, '', 'utf8');
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: liveFile, sessionId: baseId },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(existsSync(liveFile)).toBe(false);
+    expect(existsSync(reset1)).toBe(false);
+    expect(existsSync(reset2)).toBe(false);
+  });
+
+  it('still succeeds and updates sessions.json when the transcript is already gone', async () => {
+    const sessionKey = 'agent:main:session-ddd';
+    const baseId = 'ddd-uuid';
+    // No transcript file on disk — only sessions.json knows about it.
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: join(SESSIONS_DIR, `${baseId}.jsonl`), sessionId: baseId },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(sendJsonMock).toHaveBeenCalledWith(expect.anything(), 200, { success: true });
+    const updated = JSON.parse(readFileSync(SESSIONS_JSON, 'utf8'));
+    expect(updated[sessionKey]).toBeUndefined();
+  });
+
+  it('rejects sessionKeys that are not agent-scoped with 400', async () => {
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey: 'main' });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(sendJsonMock).toHaveBeenCalledWith(
+      expect.anything(),
+      400,
+      expect.objectContaining({ success: false }),
+    );
+  });
+
+  it('rejects agentIds that contain path-traversal segments with 400', async () => {
+    // Even if the caller manages to put `..` into the agent slot, the route
+    // must refuse before any FS access happens — otherwise sessionsDir would
+    // resolve outside ~/.openclaw/agents/.
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey: 'agent:..:foo' });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(sendJsonMock).toHaveBeenCalledWith(
+      expect.anything(),
+      400,
+      expect.objectContaining({ success: false }),
+    );
+  });
+
+  it('refuses to unlink files when sessionFile points outside the agent sessions dir', async () => {
+    // Defence-in-depth: if a corrupt sessions.json claims the transcript
+    // lives in /tmp (or anywhere outside the agent sessions folder), the
+    // sweep must not run there and existing files must survive untouched.
+    const sessionKey = 'agent:main:session-escape';
+    const escapeDir = join(testOpenClawConfigDir, 'unrelated-dir');
+    mkdirSync(escapeDir, { recursive: true });
+    const escapeFile = join(escapeDir, 'escape-uuid.jsonl');
+    writeFileSync(escapeFile, 'must-not-be-deleted', 'utf8');
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: escapeFile, sessionId: 'escape-uuid' },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(sendJsonMock).toHaveBeenCalledWith(
+      expect.anything(),
+      400,
+      expect.objectContaining({ success: false }),
+    );
+    expect(existsSync(escapeFile)).toBe(true);
+    expect(readFileSync(escapeFile, 'utf8')).toBe('must-not-be-deleted');
+    // sessions.json is left intact when the resolution fails — the entry
+    // stays so a follow-up fix can be applied without losing track of it.
+    const updated = JSON.parse(readFileSync(SESSIONS_JSON, 'utf8'));
+    expect(updated[sessionKey]).toBeDefined();
+  });
+
+  it("also sweeps OpenClaw's trajectory sidecars (<id>.trajectory.jsonl + <id>.trajectory-path.json)", async () => {
+    // OpenClaw writes `<base>.trajectory.jsonl` (flight recorder) and
+    // `<base>.trajectory-path.json` (pointer) next to the session file.
+    // Hard-deleting the conversation must leave neither behind, otherwise
+    // the next `sessions.list` is clean but the agent's sessions/ folder
+    // accumulates orphaned trajectory data.
+    const sessionKey = 'agent:main:session-traj';
+    const baseId = 'traj-uuid';
+    const liveFile = join(SESSIONS_DIR, `${baseId}.jsonl`);
+    const trajFile = join(SESSIONS_DIR, `${baseId}.trajectory.jsonl`);
+    const pointerFile = join(SESSIONS_DIR, `${baseId}.trajectory-path.json`);
+    writeFileSync(liveFile, '', 'utf8');
+    writeFileSync(trajFile, '{"event":"session.started"}\n', 'utf8');
+    writeFileSync(
+      pointerFile,
+      JSON.stringify({
+        traceSchema: 'openclaw-trajectory-pointer',
+        schemaVersion: 1,
+        sessionId: baseId,
+        runtimeFile: trajFile,
+      }),
+      'utf8',
+    );
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: liveFile, sessionId: baseId },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(existsSync(liveFile)).toBe(false);
+    expect(existsSync(trajFile)).toBe(false);
+    expect(existsSync(pointerFile)).toBe(false);
+  });
+
+  it('follows the trajectory pointer to unlink an OPENCLAW_TRAJECTORY_DIR-style off-sessions runtime file', async () => {
+    // When OPENCLAW_TRAJECTORY_DIR is set, the pointer's `runtimeFile`
+    // resolves outside sessions/. Without the pointer-follow, that file
+    // would be orphaned forever after deletion.
+    const sessionKey = 'agent:main:session-trajdir';
+    const baseId = 'trajdir-uuid';
+    const liveFile = join(SESSIONS_DIR, `${baseId}.jsonl`);
+    const pointerFile = join(SESSIONS_DIR, `${baseId}.trajectory-path.json`);
+    const trajectoryDir = join(testOpenClawConfigDir, 'trajectory-dir');
+    mkdirSync(trajectoryDir, { recursive: true });
+    const offDiskRuntime = join(trajectoryDir, `${baseId}.jsonl`);
+    writeFileSync(liveFile, '', 'utf8');
+    writeFileSync(offDiskRuntime, '{"event":"prompt.submitted"}\n', 'utf8');
+    writeFileSync(
+      pointerFile,
+      JSON.stringify({
+        traceSchema: 'openclaw-trajectory-pointer',
+        schemaVersion: 1,
+        sessionId: baseId,
+        runtimeFile: offDiskRuntime,
+      }),
+      'utf8',
+    );
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: liveFile, sessionId: baseId },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(existsSync(liveFile)).toBe(false);
+    expect(existsSync(pointerFile)).toBe(false);
+    expect(existsSync(offDiskRuntime)).toBe(false);
+  });
+
+  it('refuses to follow a pointer whose runtimeFile is not an absolute .jsonl path', async () => {
+    // Defence-in-depth: a malformed/hostile pointer must NOT get us to
+    // unlink arbitrary files (e.g. /etc/passwd or relative paths).
+    const sessionKey = 'agent:main:session-evilpointer';
+    const baseId = 'evilpointer-uuid';
+    const liveFile = join(SESSIONS_DIR, `${baseId}.jsonl`);
+    const pointerFile = join(SESSIONS_DIR, `${baseId}.trajectory-path.json`);
+    const bystander = join(testOpenClawConfigDir, 'bystander-dir', 'must-not-touch.txt');
+    mkdirSync(join(testOpenClawConfigDir, 'bystander-dir'), { recursive: true });
+    writeFileSync(bystander, 'kept', 'utf8');
+    writeFileSync(liveFile, '', 'utf8');
+    writeFileSync(
+      pointerFile,
+      JSON.stringify({
+        traceSchema: 'openclaw-trajectory-pointer',
+        schemaVersion: 1,
+        sessionId: baseId,
+        // Wrong extension on purpose — not a `.jsonl`.
+        runtimeFile: bystander,
+      }),
+      'utf8',
+    );
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: liveFile, sessionId: baseId },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    // The session and the (correctly-detected) pointer are gone, but the
+    // bystander file the pointer tried to escape to is untouched.
+    expect(existsSync(liveFile)).toBe(false);
+    expect(existsSync(pointerFile)).toBe(false);
+    expect(existsSync(bystander)).toBe(true);
+    expect(readFileSync(bystander, 'utf8')).toBe('kept');
+  });
+
+  it("tolerates a malformed pointer (still cleans local sidecars, doesn't fail the whole delete)", async () => {
+    const sessionKey = 'agent:main:session-malformedptr';
+    const baseId = 'malformedptr-uuid';
+    const liveFile = join(SESSIONS_DIR, `${baseId}.jsonl`);
+    const trajFile = join(SESSIONS_DIR, `${baseId}.trajectory.jsonl`);
+    const pointerFile = join(SESSIONS_DIR, `${baseId}.trajectory-path.json`);
+    writeFileSync(liveFile, '', 'utf8');
+    writeFileSync(trajFile, '', 'utf8');
+    // Garbage JSON — the sweep must not blow up.
+    writeFileSync(pointerFile, '{ not-json', 'utf8');
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: liveFile, sessionId: baseId },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(sendJsonMock).toHaveBeenCalledWith(expect.anything(), 200, { success: true });
+    expect(existsSync(liveFile)).toBe(false);
+    expect(existsSync(trajFile)).toBe(false);
+    expect(existsSync(pointerFile)).toBe(false);
+  });
+
+  it("does not touch another session's trajectory sidecars during the sweep", async () => {
+    const targetKey = 'agent:main:session-trajiso-target';
+    const survivorKey = 'agent:main:session-trajiso-keep';
+    const targetBase = 'trajiso-target';
+    const survivorBase = 'trajiso-keep';
+    const targetFile = join(SESSIONS_DIR, `${targetBase}.jsonl`);
+    const targetTraj = join(SESSIONS_DIR, `${targetBase}.trajectory.jsonl`);
+    const survivorFile = join(SESSIONS_DIR, `${survivorBase}.jsonl`);
+    const survivorTraj = join(SESSIONS_DIR, `${survivorBase}.trajectory.jsonl`);
+    const survivorPointer = join(SESSIONS_DIR, `${survivorBase}.trajectory-path.json`);
+    writeFileSync(targetFile, '', 'utf8');
+    writeFileSync(targetTraj, '', 'utf8');
+    writeFileSync(survivorFile, 'kept', 'utf8');
+    writeFileSync(survivorTraj, 'kept', 'utf8');
+    writeFileSync(survivorPointer, JSON.stringify({
+      traceSchema: 'openclaw-trajectory-pointer',
+      schemaVersion: 1,
+      sessionId: survivorBase,
+      runtimeFile: survivorTraj,
+    }), 'utf8');
+    writeSessionsJson({
+      [targetKey]: { sessionFile: targetFile, sessionId: targetBase },
+      [survivorKey]: { sessionFile: survivorFile, sessionId: survivorBase },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey: targetKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(existsSync(targetFile)).toBe(false);
+    expect(existsSync(targetTraj)).toBe(false);
+    expect(existsSync(survivorFile)).toBe(true);
+    expect(existsSync(survivorTraj)).toBe(true);
+    expect(existsSync(survivorPointer)).toBe(true);
+  });
+
+  it('treats Windows forward-slash absolute paths as absolute (cross-platform)', async () => {
+    // OpenClaw on Windows can write `sessionFile` as either `C:\…` (back-
+    // slash) or `C:/…` (forward-slash). Node's `path.win32.isAbsolute`
+    // accepts both; the resolver must too. We can't actually create a
+    // `C:/…` path on POSIX, so we cover the same code path with a Windows-
+    // style absolute that points back into our temp sessions dir using
+    // mixed slashes. The detector should still treat it as absolute and
+    // route through the in-scope sibling sweep.
+    const sessionKey = 'agent:main:session-win';
+    const baseId = 'win-uuid';
+    const liveFile = join(SESSIONS_DIR, `${baseId}.jsonl`);
+    writeFileSync(liveFile, '', 'utf8');
+    // Force forward slashes — historically this would have been classed as
+    // a *relative* filename on POSIX and `join`ed onto sessionsDir, which
+    // produced a junk path that no `readdir` could find.
+    const forwardSlashAbs = liveFile.replace(/\\/g, '/');
+    writeSessionsJson({
+      [sessionKey]: { sessionFile: forwardSlashAbs, sessionId: baseId },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(sendJsonMock).toHaveBeenCalledWith(expect.anything(), 200, { success: true });
+    expect(existsSync(liveFile)).toBe(false);
+  });
+
+  it('does not touch other sessions in the same directory', async () => {
+    const targetKey = 'agent:main:session-eee';
+    const survivorKey = 'agent:main:session-fff';
+    const targetBase = 'eee-uuid';
+    const survivorBase = 'fff-uuid';
+    const targetFile = join(SESSIONS_DIR, `${targetBase}.jsonl`);
+    const survivorFile = join(SESSIONS_DIR, `${survivorBase}.jsonl`);
+    writeFileSync(targetFile, '', 'utf8');
+    writeFileSync(survivorFile, 'kept', 'utf8');
+    writeSessionsJson({
+      [targetKey]: { sessionFile: targetFile, sessionId: targetBase },
+      [survivorKey]: { sessionFile: survivorFile, sessionId: survivorBase },
+    });
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey: targetKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(existsSync(targetFile)).toBe(false);
+    expect(existsSync(survivorFile)).toBe(true);
+    expect(readFileSync(survivorFile, 'utf8')).toBe('kept');
+    const updated = JSON.parse(readFileSync(SESSIONS_JSON, 'utf8'));
+    expect(updated[targetKey]).toBeUndefined();
+    expect(updated[survivorKey]).toBeDefined();
+  });
+
+  it('also supports the array-shape sessions.json (sessions[] with id field)', async () => {
+    const sessionKey = 'agent:main:session-ggg';
+    const baseId = 'ggg-uuid';
+    const liveFile = join(SESSIONS_DIR, `${baseId}.jsonl`);
+    writeFileSync(liveFile, '', 'utf8');
+    writeSessionsJson({
+      sessions: [
+        { key: sessionKey, id: baseId },
+        { key: 'agent:main:keep', id: 'keep-uuid' },
+      ],
+    });
+    writeFileSync(join(SESSIONS_DIR, 'keep-uuid.jsonl'), 'kept', 'utf8');
+    parseJsonBodyMock.mockResolvedValueOnce({ sessionKey });
+
+    const { handleSessionRoutes } = await import('@electron/api/routes/sessions');
+    await handleSessionRoutes(makeReq(), makeRes(), DELETE_URL, ctx);
+
+    expect(existsSync(liveFile)).toBe(false);
+    expect(existsSync(join(SESSIONS_DIR, 'keep-uuid.jsonl'))).toBe(true);
+    const updated = JSON.parse(readFileSync(SESSIONS_JSON, 'utf8')) as { sessions: Array<{ key: string }> };
+    expect(updated.sessions.find((s) => s.key === sessionKey)).toBeUndefined();
+    expect(updated.sessions.find((s) => s.key === 'agent:main:keep')).toBeDefined();
+  });
+});