Vendor intx-types and intx-storage-isogit at upstream head

Re-syncs vendor/intx-types and vendor/intx-storage-isogit from Interchange
commit 55c4431e60cc97dae2f63bfd52de56166e42b13b (both were previously at
ad0f99e7). vendor/intx-inference stays at ad0f99e7 for now (tracked
separately); the shared PendingOperation shape did not change in this
range so the two are still compatible.

Both packages remain verbatim, no local patches. storage-isogit's index
now requires a runtime-bound entry point (./node or ./browser) instead of
a bare createIsogitStore export; the one first-party consumer switches to
@intx/storage-isogit/node, which keeps the identical signature. Adds the
package's two new upstream deps (@isomorphic-git/lightning-fs, buffer,
both browser-only) and a 0.2.2-pinned @intx/crypto dev dependency,
mirroring the existing @intx/mime pin on intx-inference.

Excludes vendor/intx-storage-isogit/src/browser-bundle.test.ts via
bunfig.toml: it bundles against an export condition that resolves
@intx/log/@intx/mime to source files that only exist in upstream's own
monorepo, not in our published-npm installs of those two packages.

Full suite: 6042 pass, 1 pre-existing failure in vendor/intx-inference's
reactor.test.ts unrelated to this sync (reproduces identically before
these changes).

Part of CL-5684; fixes CL-6826
https://linear.app/abklabs/issue/CL-6826

Author: TheGreatAxios

bun.lock

@@ -4,4 +4,12 @@ pathIgnorePatterns = [
   "tests/fixtures/**",
   "eval/tasks/**",
   "tmp/**",
+  # Bundles vendor/intx-storage-isogit's browser entry point with Bun.build,
+  # under the "intx-src" export condition that resolves @intx/log and
+  # @intx/mime to ./src/*.ts. Upstream's own monorepo vendors those two
+  # packages too, so the condition finds real source; here they stay on
+  # published npm (dist-only, no src/), so the condition matches an export
+  # key whose target file doesn't exist. Not a vendored-code defect — see
+  # docs/VENDORING.md.
+  "vendor/intx-storage-isogit/src/browser-bundle.test.ts",
 ]

bunfig.toml

@@ -24,8 +24,21 @@ points straight at `./src/*.ts` files rather than a `dist/` build.
 | Package | Vendor path | License | Synced from upstream commit | Retrieved | Local patches |
 |---|---|---|---|---|---|
 | `@intx/inference` | `vendor/intx-inference/` | LGPL-2.1-only | `ad0f99e7977b3ad4f28d8cc8d446ac52a4a2d685` | 2026-08-10 | Yes — see `vendor/intx-inference/PATCHES.md` |
-| `@intx/types` | `vendor/intx-types/` | LGPL-2.1-only | `ad0f99e7977b3ad4f28d8cc8d446ac52a4a2d685` | 2026-08-10 | None — verbatim |
-| `@intx/storage-isogit` | `vendor/intx-storage-isogit/` | LGPL-2.1-only | `ad0f99e7977b3ad4f28d8cc8d446ac52a4a2d685` | 2026-08-10 | None — verbatim |
+| `@intx/types` | `vendor/intx-types/` | LGPL-2.1-only | `55c4431e60cc97dae2f63bfd52de56166e42b13b` | 2026-08-22 | None — verbatim |
+| `@intx/storage-isogit` | `vendor/intx-storage-isogit/` | LGPL-2.1-only | `55c4431e60cc97dae2f63bfd52de56166e42b13b` | 2026-08-22 | None — verbatim |
+
+`@intx/inference` is temporarily behind `@intx/types` and
+`@intx/storage-isogit` as of the 2026-08-22 sync: this is stage 2 of a
+staged re-vendor (the two lower-coupling packages first), with
+`@intx/inference`'s re-sync tracked separately as stage 3. The
+cross-package coupling described below did not regress in this gap — the
+`PendingOperation` shape both packages already shared did not change
+between `ad0f99e7` and `55c4431e` (`vendor/intx-types/src/runtime.ts` and
+`src/index.ts` are byte-identical across that range), so `@intx/inference`
+built against the older `@intx/types` still typechecks against the newer
+one. A later re-sync of `@intx/inference` should still move all three
+together per the coupling rule below, since that check only holds for
+this specific gap, not in general.
 
 The license column records what each package declares in its own
 `package.json`; the corresponding `LICENSE` file travels with every vendored
@@ -114,6 +127,36 @@ those packages now resolves to the single root instance. As of this sync,
 no modifications. A diff against any later upstream checkout at the same
 paths will show 100% upstream-authored lines.
 
+## Notable upstream shape changes carried by the 2026-08-22 sync
+
+Upstream commit `5f798bea` ("Inject the runtime into iso-git storage")
+split `@intx/storage-isogit`'s entry point: the package root (`.`) no
+longer exports a bindable `createIsogitStore` free function, and callers
+now pick a runtime-bound entry point instead — `./node` (backed by
+`createNodeIsogitRuntime`) or `./browser`. `vendor/intx-storage-isogit/`'s
+`package.json` `exports` map picks up both new subpaths verbatim from
+upstream. The one first-party consumer,
+`src/session/optimized-context-store.ts`, now imports `createIsogitStore`
+from `@intx/storage-isogit/node` instead of the package root — the
+`./node` re-export has the identical `(dir, signer?, gcPolicy?)` signature
+the old root export had, so this is an import-path change, not a
+behavioral one. The package also picked up two new dependencies
+(`@isomorphic-git/lightning-fs`, `buffer`, both used only by the new
+`./browser` runtime, which nothing here imports) and a new
+`@intx/crypto` dev dependency for its own test suite, pinned to `0.2.2`
+like the existing `@intx/mime` dev dependency on `@intx/inference` — the
+same "stay on published npm for a package we don't vendor" pattern.
+
+One new upstream test, `browser-bundle.test.ts`, is excluded via
+`bunfig.toml`'s `pathIgnorePatterns`. It bundles `browser.ts` with
+`Bun.build` under the `intx-src` export condition, which resolves
+`@intx/log` and `@intx/mime` to `./src/*.ts` — real files in upstream's
+own monorepo, where those two are also vendored source. Here they remain
+published npm installs (`dist/` only, no `src/`), so the condition
+matches an export key whose target does not exist and the bundle fails
+to resolve. This is an environment gap, not a defect in the vendored
+code; re-check it whenever `@intx/log` or `@intx/mime` get vendored too.
+
 `@intx/inference` carries local patches — real fixes not yet present
 upstream, not workarounds for something upstream has since fixed. Every
 patched location carries a one-line comment naming its site-specific entry

docs/VENDORING.md

@@ -1,7 +1,7 @@
 import fs from "node:fs";
 import path from "node:path";
 import { type } from "arktype";
-import { createIsogitStore } from "@intx/storage-isogit";
+import { createIsogitStore } from "@intx/storage-isogit/node";
 import {
   ContentBlock,
   type ConnectorThreadState,

src/session/optimized-context-store.ts

@@ -1,7 +1,7 @@
 # @intx/storage-isogit
 
 Isomorphic-git backed implementation of `ContextStore` and
-`AuditStore`. Each agent gets its own git repository on disk;
+`AuditStore`. Each agent gets its own git repository in the host filesystem;
 inference state lives on a working branch, the tool-authorization
 audit log lives on its own branch, and mail history lives in a
 dedicated audit store that commits each inbound and outbound
@@ -12,17 +12,81 @@ Consumed by `@intx/agent` for in-process persistence, and by
 repositories that move between the hub and the sidecar as packs.
 
 ```ts
-import { createIsogitStore } from "@intx/storage-isogit";
+import { createIsogitStore } from "@intx/storage-isogit/node";
 
 const store = await createIsogitStore("./tmp/agent-repo", signer);
 
 // store implements both ContextStore and AuditStore -- hand it to
 // the inference and tool layers as appropriate.
 ```
 
+Node and Bun consumers use the `/node` entry point above. The package root is
+runtime-neutral and exports `createIsogitStorage(runtime)` for hosts that
+provide their own filesystem:
+
+```ts
+import type { FsClient } from "isomorphic-git";
+import { createIsogitStorage } from "@intx/storage-isogit";
+
+type IsogitRuntime = {
+  fs: FsClient;
+  rename(oldPath: string, newPath: string): Promise<void>;
+  path: {
+    join(...parts: string[]): string;
+    relative(from: string, to: string): string;
+    resolve(filepath: string): string;
+  };
+  flush?: () => Promise<void>;
+};
+```
+
+The storage layer derives its other filesystem operations from `FsClient`,
+including recursive directory creation and removal, existence checks, and
+UTF-8 text reads. `rename` remains explicit because completed packs require an
+atomic publish primitive. Persistent backends can implement `flush` to make
+completed mutations durable before the API call resolves.
+
+Audit and error record paths are append-only. Repeating a byte-identical
+record is an idempotent retry, including after an uncertain persistence
+failure; reusing the same path for different content is rejected. Mail commits
+reconcile an uncertain ref publication before the same store accepts another
+message, so a committed message cannot have its ordinal reused.
+
+Browsers can use the included LightningFS IndexedDB adapter:
+
+```ts
+import { createBrowserIsogitStorage } from "@intx/storage-isogit/browser";
+
+const storage = createBrowserIsogitStorage("agent-storage");
+const store = await storage.createIsogitStore("/agents/example");
+```
+
+The browser adapter supplies isomorphic-git's Buffer compatibility, atomic
+rename, POSIX path operations, and IndexedDB-backed file storage. Each call to
+`createBrowserIsogitStorage(name)` claims a fresh volume and clears any prior
+contents for that name. Call it exactly once per name during a page or worker
+lifetime, then pass the returned storage object to every consumer. Reusing the
+same name from another factory call, bundle, tab, or worker is unsupported and
+may clear active data.
+
+Browser storage is intentionally disposable: a page reload, tab close, or
+worker restart ends the logical session, and the next owner starts from an
+empty volume instead of attempting recovery. `flush()` writes the current
+filesystem state to IndexedDB, but does not promise that state will survive a
+new owner. IndexedDB is the storage medium, not a restart-persistence
+guarantee. Use absolute repository paths; relative browser paths resolve from
+`/`. Applications that require restart persistence must inject a durable
+runtime through the package root and own that runtime's recovery guarantees.
+
 The pack-send and pack-receive helpers (`createDeployPack`,
 `createNegotiatedPack`, `applyPack`, `receivePackObjects`) produce
 and consume the wire bytes that `@intx/pack-transport` chunks
 across the WebSocket. A `CommitSigner` is optional but required
 when the consumer needs every commit to carry a verifiable
 signature.
+
+Pack receivers flush an accepted pack before checkout or ref promotion. If a
+later ref or persistence operation fails, the call rejects but retains the
+pack because the ref update may already be observable. Callers must treat that
+error as an uncertain promotion outcome rather than assuming the ref is
+unchanged; whichever ref value is visible remains backed by durable objects.

vendor/intx-storage-isogit/README.md

@@ -7,13 +7,26 @@
     ".": {
       "types": "./src/index.ts",
       "default": "./src/index.ts"
+    },
+    "./node": {
+      "types": "./src/node.ts",
+      "default": "./src/node.ts"
+    },
+    "./browser": {
+      "types": "./src/browser.ts",
+      "default": "./src/browser.ts"
     }
   },
   "dependencies": {
     "@intx/log": "0.2.2",
     "@intx/mime": "0.2.2",
     "@intx/types": "workspace:*",
+    "@isomorphic-git/lightning-fs": "4.7.0",
     "arktype": "catalog:",
+    "buffer": "^6.0.3",
     "isomorphic-git": "catalog:"
+  },
+  "devDependencies": {
+    "@intx/crypto": "0.2.2"
   }
 }

vendor/intx-storage-isogit/package.json

@@ -0,0 +1,25 @@
+import { expect, test } from "bun:test";
+import path from "node:path";
+
+test("browser entry bundles without Node filesystem or path modules", async () => {
+  const result = await Bun.build({
+    entrypoints: [path.join(import.meta.dir, "browser.ts")],
+    target: "browser",
+    format: "esm",
+    conditions: ["intx-src"],
+  });
+  if (!result.success) {
+    throw new Error(
+      result.logs
+        .map((log) => (log instanceof Error ? log.message : String(log)))
+        .join("\n"),
+    );
+  }
+  const output = result.outputs[0];
+  if (output === undefined) {
+    throw new Error("Browser storage bundle produced no output");
+  }
+  const bundle = await output.text();
+  expect(bundle).not.toContain('from "node:fs"');
+  expect(bundle).not.toContain('from "node:path"');
+});

vendor/intx-storage-isogit/src/browser-bundle.test.ts

@@ -0,0 +1,34 @@
+import { describe, expect, test } from "bun:test";
+import path from "node:path";
+
+import { browserPath } from "./browser-path";
+
+describe("browserPath", () => {
+  test.each([
+    [[], "."],
+    [["/repo", ".git", "objects"], "/repo/.git/objects"],
+    [["repo", "state", "..", "audit"], "repo/audit"],
+    [["/", "repo", "//state"], "/repo/state"],
+  ] as const)("join(%j)", (parts, expected) => {
+    expect(browserPath.join(...parts)).toBe(expected);
+    expect(browserPath.join(...parts)).toBe(path.posix.join(...parts));
+  });
+
+  test.each([
+    ["/repo", "/repo/.git/objects", ".git/objects"],
+    ["/repo/state", "/repo/audit", "../audit"],
+    ["/repo", "/repo", ""],
+    ["repo", "other/file", "../other/file"],
+  ])("relative(%s, %s)", (from, to, expected) => {
+    expect(browserPath.relative(from, to)).toBe(expected);
+  });
+
+  test.each([
+    ["/repo/../state", "/state"],
+    ["repo/./state", "/repo/state"],
+    ["/../../repo", "/repo"],
+    ["", "/"],
+  ])("resolve(%s)", (filepath, expected) => {
+    expect(browserPath.resolve(filepath)).toBe(expected);
+  });
+});

vendor/intx-storage-isogit/src/browser-path.test.ts

@@ -0,0 +1,55 @@
+import type { IsogitPath } from "./runtime";
+
+function normalize(filepath: string, absolute: boolean): string {
+  const segments: string[] = [];
+  for (const segment of filepath.split("/")) {
+    if (segment === "" || segment === ".") {
+      continue;
+    }
+    if (segment === "..") {
+      if (segments.length > 0 && segments.at(-1) !== "..") {
+        segments.pop();
+      } else if (!absolute) {
+        segments.push(segment);
+      }
+      continue;
+    }
+    segments.push(segment);
+  }
+
+  if (absolute) {
+    return segments.length === 0 ? "/" : `/${segments.join("/")}`;
+  }
+  return segments.length === 0 ? "." : segments.join("/");
+}
+
+function resolve(filepath: string): string {
+  return normalize(filepath.startsWith("/") ? filepath : `/${filepath}`, true);
+}
+
+function join(...parts: string[]): string {
+  if (parts.length === 0) {
+    return ".";
+  }
+  const combined = parts.join("/");
+  return normalize(combined, combined.startsWith("/"));
+}
+
+function relative(from: string, to: string): string {
+  const fromSegments = resolve(from).split("/").filter(Boolean);
+  const toSegments = resolve(to).split("/").filter(Boolean);
+  let shared = 0;
+  while (
+    shared < fromSegments.length &&
+    shared < toSegments.length &&
+    fromSegments[shared] === toSegments[shared]
+  ) {
+    shared += 1;
+  }
+  return [
+    ...fromSegments.slice(shared).map(() => ".."),
+    ...toSegments.slice(shared),
+  ].join("/");
+}
+
+export const browserPath: IsogitPath = { join, relative, resolve };