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0.10.0 — 2026-09-27

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@github-actions github-actions released this 27 Sep 07:18
v0.10.0
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Learn about vigilant mode.

Release Notes

It's Daemon Time.

Plain synaps is now a thin client over a shared
background daemon: extensions boot once, sessions are journaled and
resumable, and more than one client can sit on the same session. The
context-continuation work (#112) ships alongside it, off by default.

Added

  • Daemon mode, on by default. Plain synaps adopts the running daemon
    for its profile, or spawns one, and attaches as a thin client. An
    auto-spawned daemon exits 10 s after its last client leaves; a lost daemon
    connection exits with code 4. Extensions load once and are shared across
    sessions and subagents. Measured on real sessions: 74–78% less memory for
    5–10 sessions, about 2 MB per extra session. (#105, #111, #115, #116, #122)
  • Several clients on one session: attach from another terminal (mirror,
    observe or take over), replay of a parked session on attach, and a bare
    --continue. synaps daemon reload swaps in a new binary without ending
    sessions. (#111, #116)
  • Session identity: a session's environment and working directory come
    from the client that created it, not from the daemon; --system ./file
    is read on the client, by content. (#117, #119)
  • Secrets never reach the daemon. A thin client strips secret
    environment variables before connecting, and they are never written to
    the session files: secret-looking names (*_KEY, *_TOKEN, *SECRET*,
    *PASSWORD*, *_CREDENTIALS, *_PAT, *_DSN) and any value that
    carries credentials in a URL (a DATABASE_URL holding a username and
    password, an authenticated proxy, a Sentry DSN). The agent's tools run with the
    stripped environment, and a command that fails while referencing a
    stripped variable gets a notice. An authenticated HTTPS_PROXY is used
    implicitly by curl and git, so it fails without one. (#119, #152)
  • Daemon and startup settings in the config file and on the Settings
    page: startup.quick_start (on), daemon.idle_exit_secs (10; 0 = never),
    daemon.prompt_abandon_secs (3600), daemon.parked_evict_secs,
    startup.extensions_ready_timeout_secs. Environment variables still take
    precedence. (#138)
  • Local multimodal attachments: /attach, /attachments and /detach
    in the TUI and headless chat, for images, PDFs and UTF-8 text, translated
    per provider capability. Nothing changes until you attach. (#112, #137)
  • /auto autonomous driver: explicitly started, one per session, Esc or
    Ctrl-C cancels. (#128, #137)
  • Opt-in context continuation, Axel memory backend and project forum,
    all off by default (context_management.mode = off,
    memory.backend = legacy). The Axel backend needs its separately built
    sidecar and Linux. (#112, #120, #121, #137)
  • events.auto_turn_cap (0 = unlimited). (#106)
  • Models: GPT-6 Astra and the Ultra xhigh effort for Codex (#110);
    Grok 4.7 through xAI OAuth Responses (#146).
  • TUI: response start/reset rendering, non-blocking sidecar startup and a
    /sidecar command. (#126)

Changed

  • Subagent tool descriptions: completion is reactive; never sleep or poll.
    (#118)

Fixed

  • A bash command that printed output and then failed reached the model
    as a success     (F28): the output won over the exit status. Affected every
    build since streaming landed. (#119)
  • A turn where the model spoke before a tool call and then had nothing to
    add was treated as an error and dropped (F19). (#120)
  • A hostile provider output_index could grow memory without bound. (#145)
  • edit/write atomic writes could collide on the temporary path. (#141)
  • Session saves failed under traverse-only (0711) parent directories. (#150)

Upgrade notes

  • SYNAPS_DAEMON=0 turns every daemon feature off and runs in-process, as
    in 0.9. SYNAPS_DAEMON_ADOPT=0 keeps plain synaps in-process while
    leaving synaps daemon and --attach available. If the daemon cannot
    start, plain synaps falls back to in-process with a notice.
  • In daemon mode the agent's tools no longer see secret environment
    variables (see "Secrets never reach the daemon" above). Use
    SYNAPS_DAEMON=0 for a workflow that needs one in the agent's shell.

Internal

  • Benchmark suite: BENCHMARKS.md and benchmarks/. (#139, #140)
  • CI flake fixes and the engine test port. (#125, #142, #143, #151)

Install synaps 0.10.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/HaseebKhalid1507/SynapsCLI/releases/download/v0.10.0/synaps-installer.sh | sh

Download synaps 0.10.0

File Platform Checksum
synaps-aarch64-apple-darwin.tar.gz Apple Silicon macOS checksum
synaps-x86_64-apple-darwin.tar.gz Intel macOS checksum
synaps-aarch64-unknown-linux-gnu.tar.gz ARM64 Linux checksum
synaps-x86_64-unknown-linux-gnu.tar.gz x64 Linux checksum
synaps-x86_64-unknown-linux-musl.tar.gz x64 MUSL Linux checksum
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