Release the Web Stream reader after either completion or cancellation. Strengthen the oversized-file test so a regression that downloads content before applying the stat bound fails directly.
- E2BFileSystem.readBytes now short-circuits on the stat size before any
content transfer and streams the remote object, cancelling at the first
chunk past the cap, honoring the seam's bounded-buffering contract; the
fs-e2b README pair documents the new primitive.
- The tool-fs HMR test now proves the attachments-scoped registration:
disposing the store withdraws read_image while read/write/edit stay,
remounting restores it, and disposing the plugin withdraws everything.
- read_image caps reads at the smaller of maxImageBytes and
maxMessageImageBytes, records an absent observation for a missing
target like its sibling read, widens the mismatch remedy to cover
out-of-family formats, and renames the gate's parameter to
requestedPath; module/apply/registration JSDoc now match the shipped
composition. zh terminology aligned; the examples manifest keeps its
literal arrow.
The model reads a PNG/JPEG/WebP/GIF file, the bytes commit through the
durable attachment lifecycle, and the tool result carries the real
ImageBlock so the image enters context from the next request onward.
FileSystem gains a bounded readBytes primitive (local + E2B providers);
registration is conditional on the attachment store, and a strict
execution gate refuses routes that do not declare image input, so a
text route's durable history stays free of image blocks. llm-replay
models may declare inputModalities, letting keyless ACP snapshots pin
both the sha256-referenced success and the verbatim refusal.
Supersedes the withdrawn route-scoped design of PR #598; the decision
record is .agents/notes/implemented/feature/2026-08-10-minimal-read-image-tool.md.
- subprocess-e2b: the 20 ms remote poll cadence becomes a validated pollMs
Config field (each tick is one control-plane request); the README documents
the latency-versus-request-count trade.
- subprocess-e2b: extract src/remote.ts owning asError, signalOpts,
commandOpts, delay, waitTick, and one tolerant signalRemoteGroups shared by
the pgid-keyed process ladder and sid-keyed terminal ladder, so the two
teardown paths keep identical error tolerance.
- subprocess-e2b: service disposal aggregates sibling cleanup failures into
one AggregateError instead of discarding all but the first.
- subprocess-e2b: waitForProcessGroupId refuses published group ids <= 1, so
a same-UID rewrite of the pid file cannot aim termination at kill -- -1;
README documents the same-UID control-state limitation.
- subprocess-e2b: drain-grace expiry now releases an inherited-output E2B
callback blocked on host backpressure before disconnecting, so the SDK
settlement cannot stay pinned behind an unread host stream.
- subprocess-e2b: spawn/spawnTerminal stop validating typed spec fields
(trust-TypeScript rule; pty-local validates its config before specs exist);
resolveExecutable rejects separator-containing relative paths per the seam
contract; terminal setups tracked as a Set of records.
- subprocess-e2b: PTY output push-without-backpressure is a documented
contract (flowing consumer folds bytes; paused consumer buffers).
- fs-e2b: streamText normalizes the pinned SDK's empty-file '' return into an
empty stream instead of throwing on getReader().
- e2b overlays: comment the one-world cwd invariant across e2b.cwd,
workspaceRoot, and bash-local's implicit default workdir.
E2B starts command and PTY requests through login shells, so isolate each control shell behind a fresh randomized HOME and blank sandbox credential names before mutable profiles can run. Preserve the real remote HOME only for the requested argv.
Collapse duplicate termination state, keep failed force cleanup retryable until quiescence is observed, and make terminal state allocation cancellable. Leave numeric PGID reuse as an explicit provider-level TODO because a userspace precheck would remain TOCTOU.
