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Public release notes for Stack. Use this page to understand what changed, what may break, and which release channel a change belongs to. Every other Stack doc page links here via stackVersion frontmatter — see Documentation index below.
The repository changelog is the canonical technical source: stack/CHANGELOG.md. Private launch gates, dogfood evidence, internal waivers, and operator-only incident notes live outside the public docs.

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Channels

ChannelWhat to expect
dev / nightlyLatest usable Stack from main. Good for dogfood and early feedback. May carry known limitations with rollback notes.
release candidateShort freeze before stable. Fixes, docs, packaging, and evidence only.
stableSupported public release with documented install, update, support, and rollback or migration posture.

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Public Entry Format

Each public entry should include:
  • version or nightly id;
  • release channel;
  • install or update instructions when they changed;
  • user-visible additions, changes, fixes, and removed behavior;
  • breaking changes with migration steps;
  • known limitations that affect first-run or hosted-feature use;
  • links to docs, GitHub Release, or issue threads when public.
Do not include private Linear ids, private eval data, secret names, internal waiver details, customer-specific incidents, or raw proof transcripts here.

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Documentation index

Each Stack doc page declares stackVersion (and stackIntroduced when new) in frontmatter and links here. Use this table to find which release first documented a page or last updated it.
PageSlugIntroducedCurrent as of
Overview/stack0.1.00.2.0-dev.20260703.2
Quickstart/stack/quickstart0.1.00.2.0-dev.20260703.2
Local-only mode/stack/local-only0.2.0-dev.20260702.10.2.0-dev.20260702.3
Connect Synth/stack/connect-synth0.2.0-dev.20260702.10.2.0-dev.20260702.3
Hosted ops/stack/hosted-ops0.2.0-dev.20260702.10.2.0-dev.20260702.3
Cockpit/stack/cockpit0.1.00.2.0-dev.20260703.2
Goal mode & monitor/stack/goal-mode0.2.0-dev.20260701.10.2.0-dev.20260703.2
stackd/stack/stackd0.1.00.2.0-dev.20260701.1
Stack MCP/stack/mcp0.1.00.2.0-dev.20260703.2
Configuration/stack/configuration0.1.00.2.0-dev.20260701.1
Hosted inference/stack/inference0.1.00.2.0-dev.20260702.3
Optimizers (GEPA)/stack/optimizers0.1.00.1.0

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Entries

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2026-07-03
stack0.2.0-dev.20260703.2nightly
Stack nightly 0.2.0-dev.20260703.2 — Monitor Gardener Goal release on the nightly channel.
  • Lights panel: /lights on opens a right-panel cockpit with scrollable and filterable threads, gardener status, actor status, cloud state, local runtime, and usage. /lights off closes it without changing the active worker or gardener view.
  • Slash commands: the slash menu now documents /help, /exit, /goal, /gardener//g, /monitor//m, /lights, /threads//p, /mode//work_mode, /provider//harness, /profile, /model, /effort, /efforts, /subagents, /usage, /experimental, /ops, /actors, /agent, /agent-view//a, /permissions//perm, /settings telemetry, /config, /details//d, /rails//b, and /clear//c.
  • Gardener workflow: /gardener opens in the core panel; Stack MCP now gives gardeners owner-route tools for durable worker/meta-thread creation and goal assignment.
  • Effort evidence capture: stack effort capture and stack_effort_record_capture preserve terminal, browser, screenshot, monitor, benchmark, optimizer, and other ad hoc evidence with capture-oriented receipt metadata.
  • Optimizer candidate evidence: stack effort optimizer-candidate and stack_effort_record_optimizer_candidate preserve candidate id, score, split, optimizer run id, and artifact provenance for GEPA or hosted optimizer candidates; task-classifier audits verify the typed optimizer-candidate activity receipt and source sidecar.
  • Engineering Effort packets: stack effort engineering-packet and stack_effort_write_engineering_packet create change summaries with changed files, diff stat, validation, skipped gates, risks, and next action.
  • Effort acceptance receipts: stack effort acceptance and stack_effort_record_acceptance update one A-level section in findings/results/acceptance-summary.md, append typed acceptance activity, and let generated handoffs derive open risk bullets from remaining acceptance work and the latest blocker.
  • Effort blocker receipts: stack effort resolve-blocker and stack_effort_resolve_blocker preserve resolution evidence for cleared or superseded blockers while keeping Efforts out of a blocked lifecycle state.
  • Efforts panel controls: /efforts supports j/k selection, n new Effort drafting, h handoff refresh, a archive/activate, b current-thread binding, and r refresh; /efforts new, /efforts archive, and /efforts activate expose the same lifecycle actions from slash input.
  • Goal mode: worker chat and slash commands stay available while the monitor sidecar is visible.
  • Fixes: repaired transcript blackspace/input placement, blank resumed goal first-paint, terminal exit cleanup, and Lights panel focus stealing.
  • Distribution packet: nightly aarch64-apple-darwin artifact prepared with SHA256 b8a86789405831809683747f85083511e982678c1aadb92d4e3e3fff0c31d526; hosted release-site contract proof installed the generated manifest and verified version, doctor, demo receipt, and update-check behavior.
Known limitation: this is a nightly packet. Stable release signing and attestation remain outside this dev-channel ship.See the repository CHANGELOG.md for the full nightly technical entry.
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2026-07-03
stack0.2.0-dev.20260703.1nightly
Stack nightly 0.2.0-dev.20260703.1 — artifact round-trip, hosted-run watching, per-task preflight, and papercut capture on the nightly channel.
  • Round-trip verbs: stack pull, stack apply, and stack push move optimizer artifacts between hosted runs and the local workspace, recording a typed receipt (sha256 digest, git SHA, backend target) for every transfer. A stack_list_hosted_artifacts MCP tool enumerates what a hosted run produced.
  • Hosted run watch: stack watch follows a hosted optimizer run from the CLI, and the TUI gains a hosted-watch panel; both support --once snapshots and --replay over finished runs.
  • Per-task doctor: stack doctor --task <task.toml> preflights a single task pack and classifies failures as auth, quota, config, or transient.
  • Papercut capture: ctrl+f (or /papercut) records a papercut into the ledger without leaving the session.
  • Fixed: /profile now cycles through all four seeded profiles.
  • Backfill: the repository changelog now carries the previously missing 0.2.0-dev.20260702.4 hotfix section (hosted optimizer artifact-name projection fix).
See the repository CHANGELOG.md for the full nightly technical entry.
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2026-07-02
stack0.2.0-dev.20260702.3nightly
Stack nightly 0.2.0-dev.20260702.3 — local-only, hosted ops, remote sync, and Synth inference guidance shipped on the nightly channel.
  • Added docs: Local-only mode, Connect Synth, and Hosted ops.
  • Updated docs: Hosted inference now distinguishes free aux (nemotron-3-ultra) from billed GLM (glm-5.2) and states the worker opt-in invariant.
  • Updated docs: Overview and Quickstart now point to local-only and hosted-connect flows instead of treating auth as an install prerequisite.
  • Nightly refresh: 0.2.0-dev.20260702.3 carries the Stack telemetry flush endpoint fix used by the activation funnel usage-stage proof.
  • Known limitation: this is a nightly, not a stable 0.3.0 cut. Stable promotion remains a separate operator decision.
See the repository CHANGELOG.md for the full nightly technical entry.
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2026-07-01
stack0.2.0-devnightly
Stack sidecar monitor (0.2.0-dev.20260701.1, dev / nightly) — goal mode now runs a monitor agent that gives you a separate, higher-level stream for long runs.
  • Added: /goal mode defaults to a Sidecar events feed instead of the worker’s raw tool tape. Press a for the agent tape, t for the monitor’s own thread, e for events.
  • Added: a monitor agent paired 1:1 with the worker narrates meaningful progress, steers the worker when it stalls, and posts typed updates via stack_monitor_goal_status (headline, note, metric) rendered as a headline strip and milestone timeline.
  • Added: completion audit — the monitor flips a goal to done with goal_met only after it checks the worker’s claim against cited proof; an unproven claim is surfaced as blocked or goal_failed, not accepted.
  • Added: quiet monitor passes leave a dim check-in row (no change · reviewed N events) so the feed shows the monitor is watching without inventing progress.
  • Scope: this covers one goal run. Multi-goal portfolio rollups, ETA / progress-per-hour, and pause-before-irreversible are not yet wired.
See Stack Overview and the repository CHANGELOG.md.
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2026-06-29
stacknightlyplanning
Stack nightly channel planning — release lifecycle, local-first activation, terminal auth, and handoff launch bar.
  • Planned: Stack will use separate dev/nightly, release-candidate, and stable channels.
  • Added planning surface: stack doctor, stack demo, and read-only stack update --check are the first local support, receipt, and manifest proof commands for Nightly 1.
  • Planned: local Stack should run without Synth signup; Synth sign-in will unlock hosted features.
  • Planned: public changelog entries will stay user-facing, while private evidence and launch gates remain in internal release ledgers.
  • Docs (planning): Overview, Quickstart.
  • Current status: Stack is still internal alpha. Public package-manager installation and stable support expectations will be added when those channels are live.
See Stack Overview and the repository CHANGELOG.md.
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2026-06-26
stack0.1.0internal-alpha
Stack 0.1.0 internal alpha — first distributable Stack release for Synth operators.
  • Added: OpenTUI cockpit with Codex agent pane, session history, transcript tooling, and environment-aware Synth operations.
  • Added: stack-mcp for local agent access to configured Synth operations.
  • Added: local GEPA and dev-slot setup helpers for internal Synth research engineering workflows.
  • Added: bundled Codex skills for Stack setup, Synth workflows, and Stack agent bridge usage.
  • Docs: Overview, Hosted inference, Optimizers (GEPA).
  • Status: internal alpha only. Public GitHub Release and Homebrew install paths are not live yet.