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Pi Chat v0.4.8

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@oopjoy oopjoy released this 17 Sep 12:44
v0.4.8
b0b76b5

Pi Chat v0.4.8

Windows-first maintenance release

Pi Chat v0.4.8 is the formal maintenance checkpoint after the 0.4.7 stability
preview. It preserves Pi as the sole Runtime, Session/JSONL, Prompt, retry,
Steer, tool, model, and transcript authority while closing the browser and
server continuation races found during the 0.4.x convergence audit.

This is not a 1.0 or remote multi-user release. Pi Chat remains loopback-only,
local-first, and Windows-first.

The runnable Windows package is:

pi-chat-windows-0.4.8.zip

The ZIP, portable SHA-256 record, and manifest are generated from the same
v0.4.8 source revision. The GitHub release records the exact checksum from the
verified release artifact.

Included

  • One browser owner for Session-view cache writes, overlays, deletion fencing,
    and replacement invalidation.
  • RuntimeProjectionWriter as the sole browser write/freshness boundary for
    Primary readiness, confirmed capability evidence, and application lifecycle.
  • ActiveSessionProjectionWriter fencing held Bootstrap, stale HTTP views,
    cached hot views, deletion, equal-set SSE observations, and process
    replacement.
  • Runtime operation admission for Primary and Secondary hot Session reads,
    including revalidation across RPC, disk, statistics, and Fork-origin awaits.
    Detached reads fall back to JSONL-only state rather than reviving writable
    Runtime authority.
  • ModelCatalogueRevisionGate ordering Bootstrap, model-management responses,
    and catalogue SSE facts across same-revision refinements and process
    replacement.
  • Server-owned Prompt identity, shared-write FIFO, retry projection, uncertain
    delivery, Session replacement/deletion, and navigation fencing retained from
    the 0.4.7 stability work.
  • One generated source/benchmark/artifact lane manifest. Single-process and
    batched source tests no longer maintain divergent exclusion lists;
    bounded-tail-benchmark.test.ts belongs only to the benchmark lane.
  • Proactive architecture work is frozen. Future structural changes require a
    reproduced defect, release/security need, or repeatable measurement evidence.

Verification

The release candidate passed on Windows using isolated staging paths and
fixtures:

typecheck                                      passed
source, single process                         1,247 passed; 2 environment skips
source, 20 fresh-process batches               all 162 files passed
benchmark                                      33 of 33
preflight                                      86 of 86
Runtime/reconnect/reload/reclaim/shutdown       63 of 63
Playwright, isolated staged build              25 of 25
artifact/startup smoke, isolated staged build  41 passed; 1 environment skip

A three-iteration Chromium checkpoint was retained as descriptive evidence only:

cold-first-pane p50  44.50 ms
hot-switch p50       30.70 ms
load-earlier p50     37.40 ms
anchor error p50      0.00 px

No noisy performance CI thresholds were added. No live Pi Chat listener,
repository/live dist, provider, Prompt, or personal Session root was used by
this checkpoint.

Known boundaries

  • Real-provider failure, throttling, timeout, and native retry still require
    dedicated provider-level field validation.
  • No remote access mode is provided.
  • No open-source license has been selected; this release does not grant an
    MIT, Apache-2.0, or other open-source redistribution license.
  • The source archive is source-only. Use the Windows ZIP for the runnable
    packaged application.

Installation

  1. Install Node.js 22.19 or newer.
  2. Install and authenticate Pi 0.85.1 or a compatible Pi with the required RPC
    surface.
  3. Download pi-chat-windows-0.4.8.zip and its checksum sidecar.
  4. Verify the checksum, extract the ZIP, and run start-pi-chat.cmd or
    start-pi-chat-ui.ps1.
  5. Open the loopback listener shown by the launcher, normally
    http://127.0.0.1:30170.

See README.md, SECURITY.md, and
docs/architecture.md for operating and security
boundaries.

Verified Windows artifact

Release CI: https://github.com/oopjoy/Pi-Chat/actions/runs/35221860669

SHA-256  91ac423ccd80a2bbcffcac830ed9b9ec665fef912e201ae72c9bb88901348f2d  pi-chat-windows-0.4.8.zip

Verify with the attached portable .sha256 sidecar. The attached manifest binds version, tag, source revision, fingerprint, ZIP size, and checksum.

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