release: v2.8.0 — sonnet-5 defaults, opencode 1.17.20, docs backfill

Promote CHANGELOG Unreleased -> v2.8.0. Contents:
- Default models -> claude-sonnet-5 (changed-but-compatible; new containers only)
- opencode 1.17.15 -> 1.17.20
- bg-subagents removal-trigger markers refreshed 1.17.20/omos 2.2.0 (base-affecting
  -> base image rebuilds this release)
- README backfill for v2.4.0-v2.7.0 features + README/AGENTS polish

Minor per the repo versioning policy (tool bump paired with changed-compatible
default behaviour -> feature wins -> minor).

.env.example

@@ -7,7 +7,7 @@
 OPENCODE_PROVIDER=anthropic
 
 # Model override (optional, defaults per provider)
-# OPENCODE_MODEL=anthropic/claude-sonnet-4-6
+# OPENCODE_MODEL=anthropic/claude-sonnet-5
 
 # ── API Keys (set the one matching your provider) ────────────────────
 # ANTHROPIC_API_KEY=
@@ -117,3 +117,9 @@ SSH_KEY_PATH=~/.ssh
 #                              # on image pull. Independent of ENABLE_OMOS.
 #                              # See docs/omos-skills.md
 # OMOS_RESET=false             # Force regenerate oh-my-opencode-slim config on next start (does not affect skills)
+
+# ── Background subagents (opencode experimental flag) ────────────────
+# Baked ON in the image (ENV in Dockerfile.base) because OMOS V2+ default
+# orchestration depends on opencode's native background subagents. Uncomment
+# to opt out (e.g. to force blocking/foreground orchestration).
+# OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=false

.gitea/workflows/lint.yml

@@ -66,3 +66,27 @@ jobs:
         # ("no project was found"). Globbing the workflow files is the
         # supported way to lint a non-GitHub layout.
         run: actionlint -color .gitea/workflows/*.yml
+
+  hadolint:
+    # Lint the two Dockerfiles that ARE the project (the shell/actions linting
+    # above never looked at them). Config — ignored rules + failure threshold
+    # — lives in .hadolint.yaml, which hadolint reads automatically, so a local
+    # `hadolint Dockerfile.base` reproduces CI exactly.
+    runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install hadolint (pinned)
+        env:
+          HADOLINT_VERSION: 2.14.0
+        run: |
+          curl -fsSL \
+            "https://github.com/hadolint/hadolint/releases/download/v${HADOLINT_VERSION}/hadolint-Linux-x86_64" \
+            -o /usr/local/bin/hadolint
+          chmod +x /usr/local/bin/hadolint
+          hadolint --version
+
+      - name: Run hadolint
+        run: hadolint Dockerfile.base Dockerfile.variant

.hadolint.yaml

@@ -0,0 +1,27 @@
+# hadolint configuration for opencode-devbox.
+#
+# Both Dockerfiles are linted in CI (.gitea/workflows/lint.yml → `hadolint`
+# job). hadolint reads this file automatically, so a local
+# `hadolint Dockerfile.base` reproduces CI exactly.
+#
+# The ignores below are DELIBERATE project choices — they mirror the
+# philosophy of the shellcheck excludes already applied to `run:` steps
+# (SHELLCHECK_OPTS in lint.yml). Anything NOT listed here still fails the
+# build at `warning` and above, so new Dockerfile smells are caught going
+# forward.
+ignored:
+  - DL3008  # "pin apt versions" — intentionally unpinned: the base tracks
+            #   Debian stable and runs `apt-get upgrade`, so pinning point
+            #   versions would rot and fight security updates.
+  - DL3016  # "pin npm versions" — opencode / oh-my-opencode-slim ARE pinned,
+            #   but via build-args (CI-resolved from npm), not the npm CLI.
+  - DL4006  # "set -o pipefail before a pipe" — the piped RUNs are
+            #   download|extract steps with their own retries / `set -e`.
+            #   Switching the global SHELL to bash is a larger, base-affecting
+            #   change — tracked in IDEAS.md.
+  - DL3003  # "use WORKDIR, not cd" — cosmetic in the few `cd` RUNs here.
+  - SC2086  # "double-quote to prevent word-splitting" — the same code is
+            #   excluded for shell `run:` steps in lint.yml; splitting is
+            #   intentional in these contexts.
+
+failure-threshold: warning

AGENTS.md

@@ -51,8 +51,7 @@ repo, which decoupled from the pi tool version at its own `v1.0.0`.
 - **PATCH** — opencode/tool version bumps and small fixes that don't change the
   contract. When a release pairs a tool bump with a feature, the feature wins
   and it's a minor.
-- **Pre-flight check** — whenever an opencode bump is part of the release,
+- **Pre-flight check** — **before triggering any release CI build, check whether opencode is behind and offer to bump it.** Compare the pinned `OPENCODE_VERSION` in `Dockerfile.variant` against the latest npm release (`./check-versions.sh Dockerfile.variant` flags `→ X available` for opencode — note the base-only pins like `GOSU_VERSION` live in `Dockerfile.base`, so run it against that too for a full sweep). **If the latest stable `opencode-ai` is newer than the pin, ASK THE USER whether to bump before the build — never bump silently;** a version bump is a functional change they may want to hold or schedule. When a bump *is* part of the release, re-check the `OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS` removal-trigger against the new version's release notes (see the bg-subagents note under *Critical conventions*), then verify the pin is real before claiming it in the CHANGELOG:
-  verify it is real before claiming it in the CHANGELOG:
   ```bash
   npm view opencode-ai version           # must equal the X.Y.Z you pin in Dockerfile.variant
   ```
@@ -101,13 +100,14 @@ curl -s https://api.github.com/repos/anomalyco/opencode/releases/tags/v1.15.10 |
   Release-day checklist: README → (regenerate DOCKER_HUB.md only if HUB_TEMPLATE changed) → promote CHANGELOG Unreleased → grep AGENTS.md for stale counts → commit → tag → push tag.
 
   **Between releases the same coupling applies.** Doc drift is not just a release-day concern — a workflow tweak, entrypoint change, or `generate-config.py` refactor can leave any of these four files lying. Before committing a non-release change, grep the docs for references to what you touched: `git diff --name-only HEAD | xargs -I{} grep -l 'thing-you-changed' README.md AGENTS.md DOCKER_HUB.md .gitea/README.md .env.example`. If a doc says "four variants" / "two phases" / "runs on amd64 only" and your change made that no longer true, fix it in the same commit.
-- **GitHub/Gitea-sourced binaries float by default** — gosu, fzf, git-lfs, gitleaks, nvim, bat, eza, zoxide, uv, gitea-mcp, Go, oh-my-opencode-slim all default to `latest`. Each build-time install step reads the `/releases/latest` Location redirect (or the go.dev JSON feed for Go) and derives the concrete version. Use the same `ARCH` case-switch pattern for multi-arch support (amd64/arm64) — mind project-specific arch-name deviations (gitleaks uses `x64`, bat/eza/zoxide use `x86_64`/`aarch64`, gosu uses `amd64`/`arm64`). Intentional pins: `OPENCODE_VERSION` (drives the image tag), `NODE_VERSION=22` (major pin), `DEBIAN_VERSION=trixie-slim` (OS base). Adding a new upstream tool: follow the existing floated-version pattern, don't hardcode a specific tag.
+- **GitHub/Gitea-sourced binaries float by default** — gosu, fzf, git-lfs, gitleaks, nvim, bat, eza, zoxide, uv, gitea-mcp, Go, oh-my-opencode-slim all default to `latest`. Each build-time install step reads the `/releases/latest` Location redirect (or the go.dev JSON feed for Go) and derives the concrete version. Use the same `ARCH` case-switch pattern for multi-arch support (amd64/arm64) — mind project-specific arch-name deviations (gitleaks uses `x64`, bat/eza/zoxide use `x86_64`/`aarch64`, gosu uses `amd64`/`arm64`). Intentional pins: `OPENCODE_VERSION` (drives the image tag), `NODE_VERSION=22` (major pin), `DEBIAN_VERSION=trixie-slim` (OS base). Adding a new upstream tool: follow the existing floated-version pattern, don't hardcode a specific tag — **and add its `*_VERSION` ARG to the README *Build Args* table** (the floated-`latest` row alongside `GOSU_VERSION, FZF_VERSION, …`). That table is a *separate* exhaustive list from the env-var table and has silently drifted before: `MICRO_VERSION`, `TEALDEER_VERSION`, and `TYPST_VERSION` were missing from it for three releases (v2.4.0–v2.7.0), caught only by the 2026-07-13 doc-drift audit.
 - **Resolved versions are logged by the smoke test** — `scripts/smoke-test.sh` prints a "Resolved component versions" table as its first step. CI logs always capture what got baked into a given image even when ARGs default to `latest`.
 - **`OMOS_VERSION` MUST be passed by CI as a concrete version**, not left at the `latest` default. The npm install step in `Dockerfile.variant` (`oh-my-opencode-slim@${OMOS_VERSION}`) produces an identical layer-hash when the ARG value is byte-identical across builds; combined with the registry buildcache (`base-buildcache`) the layer gets reused even when `latest` would have resolved to a newer upstream. This is the same class of bug that bit pi-devbox v0.74.0 → v0.75.5 (silent same-bytes-across-releases regression discovered 2026-05-23, fixed in pi-devbox v0.75.5b). It is currently *masked* in opencode-devbox by `OPENCODE_VERSION` being a hard-coded ARG that bumps every release — that bump invalidates the parent-chain cache key for the downstream omos layer — but the masking would fail the moment a `vN.N.Nb` opencode-version-unchanged release ships that only bumps omos. Preventative fix: `.gitea/workflows/docker-publish-split.yml` has a `resolve-versions` job that runs `npm view oh-my-opencode-slim version`, exposing the concrete value as an output that the omos smoke + build jobs consume via build-args. Smoke tests assert via the `EXPECTED_OMOS_VERSION` env var — would catch the regression on the next release rather than several releases later. **If you change the variant build-args list, the resolve-versions job, or the smoke EXPECTED_*_VERSION wiring, audit all affected jobs in lockstep.**
 - **`resolve-versions` also pins `mempalace-toolkit` to a SHA** — `resolve-versions` resolves the `mempalace-toolkit` `main` HEAD to a commit SHA (`mempalace_toolkit_ref` output) via the gitea commits API (`/api/v1/repos/joakimp/mempalace-toolkit/commits?limit=1&sha=main`; gitea allows **unauthenticated** public-repo listing, so no secret is required). Unlike every other dependency, `mempalace-toolkit` is cloned in **`Dockerfile.base`**, not the variant — so the resolve→build-arg→variant plumbing bypasses it. To make a moved toolkit actually land, the resolved SHA is **folded into the `base-decide` hash** (so `base_tag` changes → base rebuilds) AND passed to `build-base` as `--build-arg MEMPALACE_TOOLKIT_REF`. Consequently **`base-decide` now depends on `resolve-versions`** (they no longer run in parallel), and the base clone uses a SHA-capable `git fetch <ref> + checkout FETCH_HEAD` (a `git clone --branch <40-char-SHA>` would fail). Trade-off: `base_tag` now reflects a live gitea lookup — on an API blip it falls back to `main`, triggering one *extra* base rebuild, never a *missed* one. If you touch `resolve-versions`, `base-decide`'s hash inputs, or the `build-base` build-args, audit `.gitea/README.md` Step 1 in lockstep.
 - **Registry buildkit cache-export is currently disabled** — do NOT re-add `cache-from`/`cache-to` to the `build-base` step in `.gitea/workflows/docker-publish-split.yml` without first verifying that buildkit's `mode=max` cache-export to `registry-1.docker.io` no longer returns HTTP 400 from the Hub CDN edge. The regression surfaced ~2026-05-23 and broke five consecutive opencode-devbox publish attempts (runs #332/333/334/336 + a rerun); root-caused on 2026-05-28 by a manual host-side publish that reproduced the same 400 only on `--cache-to` while image push worked fine. Failure shape is stable (`Offset:0` in the `_state` token, HTML response body = CDN-tier rejection, not registry backend), repo-specific (we're the only repo writing `:base-buildcache` mode=max), and explains why pinning `setup-buildx-action@v4.0.0` didn't help (action pin doesn't change the bundled buildkit version on the catthehacker runner image). Trade-off: dockerfile.base changes pay a full ~3 min rebuild instead of pulling cached layers; unchanged bases short-circuit at the Hub-probe step in `base-decide` and never re-build anyway. Variants don't use registry cache so they're unaffected. Re-enable condition: upstream moby/buildkit fix lands AND a low-risk test run succeeds without 400s. See CHANGELOG v1.15.12 `Unreleased` block for the full diagnostic chain. Manual escape-hatch publish procedure: `docs/manual-host-publish.md`.
 - **Push steps wrap `docker buildx build --push` in a 3-attempt retry loop** (15s, 30s backoff) for transient `registry-1.docker.io` blips — rate limits, brief 5xx, CDN flap. Implemented as inline `shell: bash` steps with `docker buildx build` raw rather than `docker/build-push-action@v7` so the loop is visible and tweakable. Affects the 1 base + 5 variant push steps in `.gitea/workflows/docker-publish-split.yml`; smoke-test builds (`load: true`, no push) are untouched. **This does NOT mask deterministic failures** — a true regression (like the cache-export 400 of 2026-05-23..28) fails all 3 attempts identically and the job still fails. Orthogonal to the cache-export disablement above: cache-export was about a deterministic protocol mismatch, retry is about absorbing genuine transients. Both are belt-and-braces with the `ci-release-watcher` skill's transient-rerun heuristic. If you change the matrix of push steps, keep the retry wrapper consistent across them — the pattern is duplicated rather than factored out because Gitea Actions doesn't support reusable composite shell steps cleanly.
 - **Shell scripts use `set -euo pipefail`** — both entrypoints are strict. Errors in volume chown or SSH permission operations are intentionally suppressed with `|| true`.
+- **Background subagents flag baked ON — experimental, watch for promotion** — `Dockerfile.base` sets `ENV OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=true`. opencode gates native background subagents behind this flag (`packages/opencode/src/tool/task.ts` fails with `Background subagents require OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=true` when unset); `oh-my-opencode-slim` V2+ makes background orchestration its **default** workflow, so the omos variant is effectively degraded without it. It's a base ENV (applies to both variants; harmless on plain opencode — only *enables* a capability) and stays runtime-overridable (`-e …=false`). It's counted in the base hash, so editing that line advances `base-latest`. **REMOVAL TRIGGER:** when opencode promotes background subagents out of `EXPERIMENTAL_` (flag renamed or made default), drop the ENV. No upstream roadmap date as of opencode 1.17.20 / omos 2.2.0 (2026-07). Documented in lockstep in README env table, `.env.example`, and asserted by `scripts/smoke-test.sh` (`bg-subagents env baked`).
 - **MemPalace `diary_write` anyOf workaround — upstream watch target** — `Dockerfile.base` carries a perl RUN block that strips a root-level `anyOf` from `mempalace_diary_write`'s advertised `inputSchema`. Mempalace 3.3.x/3.4.0 advertise `anyOf: [{required:[entry]},{required:[content]}]`, which Anthropic's tools API (and Codex) reject at session start (`input_schema does not support oneOf, allOf, or anyOf at the top level`), making the whole MCP server fail to load. The workaround is idempotent and self-deactivating: when upstream ships the real fix the regex stops matching and the build prints `WARN: ... upstream may have changed shape` — **that WARN is the signal to delete the RUN block.** Upstream status (last checked **2026-06-14**): issue **#1728 is still OPEN**; PR **#1735 is CLOSED UNMERGED (2026-06-11) — do NOT watch it, it is dead**; PR **#1717 is the current live fix candidate**; mempalace PyPI latest is **3.4.0 (== our pin)**, so **no release contains the fix yet** and the workaround must stay. **Removal trigger:** a mempalace release **> 3.4.0** that actually strips the root-level `anyOf` lands on PyPI — then bump `MEMPALACE_VERSION` (in lockstep with pi-devbox) and drop the RUN block. NOTE: `MEMPALACE_VERSION` (the pip pin) and `MEMPALACE_TOOLKIT_REF` (the git ref for the `mempalace-toolkit` clone) are unrelated despite the shared prefix; do not conflate them.
 - **MemPalace install path** — installed via `uv tool install` into `/opt/uv-tools/mempalace/`. Both the `mempalace` CLI and the `mempalace-mcp` MCP server binary are shipped as entry points by the mempalace package itself and placed on PATH by uv as shims whose shebangs point at the venv's Python. No hand-rolled wrapper is needed. Do not use `pip install --break-system-packages` — that was the previous approach and has been removed. Do not use `["python3", "-m", "mempalace.mcp_server"]` in `opencode.jsonc` — system Python can't import from the uv venv.
 - **generate-config.py idempotency** — the script MUST never overwrite an existing `opencode.jsonc` or legacy `opencode.json`. Config persists in the `devbox-opencode-config` named volume; accidentally clobbering that file would destroy hand-edits. The smoke test asserts this.

CHANGELOG.md

@@ -6,6 +6,156 @@ Tags follow **independent semver** (since `v2.0.0`) — they version *this image
 
 ---
 
+## v2.8.0 — 2026-07-13
+
+Minor release. Headline: **default models move to `claude-sonnet-5`** and opencode bumps `1.17.15 → 1.17.20`. Rounds out with a large user-docs backfill — five v2.4.0–v2.7.0 base features (typst PDF export, terminal terminfo, Neovim 24-bit colour, the first-shell host SSH reachability check, the baked global gitignore) that had shipped without README prose — plus the bg-subagents removal-trigger "last-checked" markers refreshed to current versions. The marker refresh edits `Dockerfile.base`, so `base-<hash>` advances and the **base image rebuilds** this release (not just the variants).
+
+### Changed
+
+- **Default models bumped to `claude-sonnet-5`.** In
+  `rootfs/usr/local/lib/opencode-devbox/generate-config.py`,
+  `DEFAULT_MODELS["anthropic"]` → `anthropic/claude-sonnet-5` (was
+  `claude-sonnet-4-6`; also feeds `FALLBACK_MODEL`) and
+  `DEFAULT_MODELS["amazon-bedrock"]` →
+  `amazon-bedrock/global.anthropic.claude-sonnet-5` (was
+  `...claude-sonnet-4-5-20250929-v1:0`). Also updates the commented
+  `OPENCODE_MODEL` example in `.env.example`. Takes effect for new containers
+  when no explicit `OPENCODE_MODEL` override is set. The `openai` default
+  (`gpt-5.4`) is unchanged.
+- **opencode bumped `1.17.15` → `1.17.20`** (`Dockerfile.variant`
+  `OPENCODE_VERSION`; latest stable on npm, verified via `npm view
+  opencode-ai version`). 1.17.16–1.17.20 are TUI/cosmetic and internal fixes
+  (command-palette flash, sub-agent task-row styling, an OpenAI Responses
+  workaround removal) — no config-affecting or breaking changes. The
+  `OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS` removal-trigger was re-checked
+  against these release notes and has **not** fired; the flag stays baked ON.
+- **Refreshed the bg-subagents removal-trigger "last-checked" markers** (`Dockerfile.base`, `AGENTS.md`) from `opencode 1.17.15 / omos 2.1.0` to `opencode 1.17.20 / omos 2.2.0`. Comment-only and the trigger has still **not** fired — but the `Dockerfile.base` edit changes the base-content hash, so `base-<hash>` advances and **the base image rebuilds** on the next release (not just the variant).
+
+### Documentation
+
+- **README backfill for v2.4.0–v2.7.0 features that shipped without user-facing docs:** PDF export via `pandoc --pdf-engine=typst` (new *Document conversion* section), terminal `TERM`/terminfo support (`ncurses-term` + `kitty-terminfo` + `xterm-ghostty`), Neovim 24-bit colour default (`termguicolors` via system `sysinit.vim`), the first-shell host SSH reachability check, and the baked global gitignore. Also adds the three floated build args missing from the Build Args table (`MICRO_VERSION`, `TEALDEER_VERSION`, `TYPST_VERSION`). Docs-only — no image change.
+- **README + AGENTS.md polish:** refreshed stale `OPENCODE_VERSION=` build-arg examples (`1.5.0`, `1.17.8` → the current `1.17.20`), linked the new `THIRD_PARTY.md` from the *License* section, and added an AGENTS.md reminder to add any new floated `*_VERSION` ARG to the README *Build Args* table (the coupling gap that hid `MICRO`/`TEALDEER`/`TYPST` for three releases).
+
+## v2.7.0 — 2026-07-13
+
+Minor release. Headline: **further parity with the sibling `pi-devbox` image** —
+ports the base additions from pi-devbox v1.4.0 + v1.5.0 that opencode-devbox
+lacked. **PDF export now works out of the box** (`typst` as the pandoc PDF
+engine — pandoc shipped since v2.6.0 as a front-end only), modern terminal
+emulators resolve their `TERM` over SSH (ncurses-term + kitty-terminfo + a
+compiled `xterm-ghostty` alias), Neovim renders in readable 24-bit colour by
+default, and a first-shell **host SSH reachability check** warns when the Mac
+host isn't reachable. Also adds repository hygiene (LICENSE, THIRD_PARTY.md,
+hadolint CI, IDEAS backlog) and a `.claude` gitignore-seed pattern. All the
+tooling/rootfs changes are base-affecting, so `base-<hash>` advances and the
+base rebuilds.
+
+### Added
+
+- **`typst` — PDF engine for pandoc (Markdown→PDF).** `pandoc` shipped in the
+  base since v2.6.0 but as a front-end only — with no PDF back-end,
+  `pandoc -o out.pdf` failed with "xelatex not found". The base now installs
+  `typst`, a single ~30 MB static Rust binary (no LaTeX), used via
+  `pandoc --pdf-engine=typst`; a fuller TeX Live remains the higher-fidelity
+  fallback (install on demand). Also patches pandoc's bundled typst template
+  (`/usr/share/pandoc/data/templates/template.typst`), whose empty `font: ()`
+  default otherwise made a naked `--pdf-engine=typst` fail with "font fallback
+  list must not be empty" — defaulted to `Libertinus Serif` so PDF export works
+  without `-V mainfont`. Adds `xz-utils` to the apt layer (typst ships a
+  `.tar.xz`). Tracks `latest`; pin with `--build-arg TYPST_VERSION=vX.Y.Z`.
+  Ported from pi-devbox v1.4.0 (+ its v1.5.0 font-default fix). Base-affecting.
+
+- **Terminal support beyond the default: `ncurses-term` + `kitty-terminfo` + a
+  compiled `xterm-ghostty` alias.** The base previously shipped only
+  `ncurses-base`, so SSHing in from a modern emulator degraded to a dumb
+  fallback. Now installs `ncurses-term` (terminfo for WezTerm, Alacritty, foot,
+  st, the base `ghostty` entry, and many more) and `kitty-terminfo`
+  (`xterm-kitty`), and compiles an `xterm-ghostty` alias with `tic -x`
+  (`use=ghostty`) — Ghostty connects as `TERM=xterm-ghostty` and no distro
+  packages that name. iTerm2's `xterm-256color` is already in ncurses-base. New
+  `rootfs/usr/local/share/terminfo-src/ghostty.terminfo`; the build asserts the
+  entry landed via `infocmp`. Ported from pi-devbox v1.5.0. Base-affecting.
+
+- **Readable Neovim colours out of the box.** New system-wide Neovim config
+  (`rootfs/etc/xdg/nvim/sysinit.vim`) enables `termguicolors`. Vanilla Neovim
+  otherwise fell back to a muddy, low-contrast 256-colour palette over ssh.
+  `sysinit.vim` is Neovim's system vimrc — it loads for every user before any
+  personal `~/.config/nvim` and can still be overridden per-user
+  (`:set notermguicolors`). Pairs with `kitty-terminfo` above. Ported from
+  pi-devbox v1.5.0. Base-affecting.
+
+- **Host SSH reachability check at shell startup.** `~/.bash_aliases` (baked
+  into the base) now runs a one-time SSH probe on the first bash session of each
+  container. If the Mac host is not reachable (Remote Login disabled or the
+  `devbox_jump` key not yet authorized) it prints a clear warning with the exact
+  two steps to fix it, including the container's public key inline. Subsequent
+  shells skip the check (a `/tmp` flag cleared on recreate); silent when SSH
+  works. Complements the existing `setup-lan-access.sh` key-generation message.
+  Ported from pi-devbox v1.4.0. Base-affecting.
+
+- **Seeded global gitignore now ignores `**/.claude/settings.local.json`.**
+  Claude Code's per-machine local settings file holds machine-specific
+  permissions and can carry credentials, so it should never be committed. The
+  seed (`rootfs/home/developer/.gitignore_global`, baked to `/etc/skel-devbox/`)
+  gains the pattern. Existing containers are unaffected (the seed is copied only
+  when `~/.gitignore_global` is absent). Base-affecting (rootfs COPY).
+
+- **Repository hygiene: `LICENSE`, `THIRD_PARTY.md`, `hadolint` CI, `IDEAS.md`.**
+  The repo declared MIT only in prose; it now ships an actual `LICENSE` file
+  (MIT, © Joakim Persson) plus `THIRD_PARTY.md` recording that the published
+  images bundle third-party software under its own terms (opencode, OMOS,
+  mempalace — MIT; gosu/uv/typst Apache-2.0; Debian packages under their own
+  licenses). A new `hadolint` job (pinned v2.14.0) in the lint workflow lints
+  `Dockerfile.base` and `Dockerfile.variant`; `.hadolint.yaml` grandfathers the
+  deliberate choices (unpinned apt/npm, `cd`-in-`RUN`, `SC2086` — mirroring the
+  existing shellcheck excludes) and fails on anything new at `warning`+.
+  `IDEAS.md` parks vetted-but-unscheduled follow-ups. Repo/CI only — not baked
+  into the image.
+
+## v2.6.0 — 2026-07-08
+
+Minor release. Headline: **CLI-toolset parity with the sibling `pi-devbox`
+image** (adds `yq`, `pandoc`, `graphviz`, `tealdeer`/`tldr`, and the `dot-watch`
+wrapper) plus **background subagents enabled by default**
+(`OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=true`), and an opencode bump
+`1.17.13 → 1.17.15`. Touches `Dockerfile.base` (apt list, new binary, new ENV)
+so the base image rebuilds (`base-<hash>` advances); the opencode bump rebuilds
+the variant layers.
+
+### Added
+
+- **CLI tooling parity with pi-devbox.** Added `yq` (YAML query/transform,
+  pairs with `jq`), `pandoc` (Markdown↔HTML/etc. document converter), and
+  `graphviz` (`dot` diagram rendering) via apt; `tealdeer` (the `tldr` command —
+  quick command examples) as a ~5 MB static musl binary via the floated
+  `TEALDEER_VERSION` arg; and the `dot-watch` wrapper (`rootfs/usr/local/bin/dot-watch`,
+  auto-renders a `.dot` file to PNG on save, graphviz-only). Deliberately did
+  **not** port `socat`, `imagemagick`, or the pi-studio-specific `studio-expose`
+  bridge. smoke-test asserts presence of all five.
+- **Background subagents enabled by default (`OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=true`).**
+  Baked as a base-level `ENV` in `Dockerfile.base`. opencode gates native
+  background subagents behind this experimental flag; OMOS V2+ makes background
+  orchestration its default workflow, so the omos variant was effectively
+  degraded without it. Overridable at runtime (`-e OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=false`).
+  Documented in README env table and `.env.example`; smoke-test asserts the var
+  is present in the image environment. Marked experimental upstream — carries a
+  removal-trigger note in `Dockerfile.base` + AGENTS.md for when opencode
+  promotes it out of experimental (no upstream roadmap date as of opencode
+  1.17.15 / omos 2.1.0).
+
+### Changed
+
+- **opencode `1.17.13` → `1.17.15`.** v1.17.14 adds a code-mode MCP adapter for
+  confined orchestration scripts, hides the `execute` tool unless code mode is
+  enabled, and **fixes paginated MCP tool catalogs losing tool metadata +
+  output-schema validation** (relevant — this image wires the mempalace,
+  gitea-mcp, and context7 MCP servers). v1.17.15 is bugfixes + desktop/TUI UX
+  (Z.ai context-overflow error classification, macOS Sequoia titlebar, model
+  picker). No breaking changes. Release notes:
+  <https://github.com/anomalyco/opencode/releases>.
+
+---
+
 ## v2.5.0 — 2026-07-02
 
 Minor release. Headline: **optional shared/external MemPalace** —

Dockerfile.base

@@ -15,7 +15,7 @@
 # content-addressed over this file, so any byte change invalidates the
 # cache. Recommended cadence: once per release for security updates.
 #
-# BASE_REBUILD_DATE: 2026-05-14 (v1.14.50b — fresh apt + first promote-base-latest)
+# BASE_REBUILD_DATE: 2026-07-13 (v2.7.0 — typst PDF engine + terminal terminfo (ncurses-term/kitty/xterm-ghostty) + nvim true-colour; pi-devbox parity)
 #
 # See the project README's "Build pipeline" section for the rationale.
 
@@ -50,6 +50,7 @@ RUN apt-get update && \
     openssh-client \
     gnupg \
     jq \
+    yq \
     ripgrep \
     fd-find \
     tree \
@@ -72,6 +73,11 @@ RUN apt-get update && \
     python3-pip \
     python3-venv \
     nano \
+    pandoc \
+    xz-utils \
+    graphviz \
+    kitty-terminfo \
+    ncurses-term \
     && ln -s /usr/bin/fdfind /usr/local/bin/fd \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
@@ -295,6 +301,56 @@ RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64"
     rm -rf /tmp/uv-* && \
     uv --version
 
+# tealdeer — Rust port of tldr (community-maintained command examples)
+# Provides the `tldr` command; ~5 MB static binary, ~135 MB smaller than
+# the Node tldr global. Same UX as the Node version.
+ARG TEALDEER_VERSION=latest
+RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64" ;; *) echo "x86_64" ;; esac) && \
+    V="${TEALDEER_VERSION}" && \
+    if [ "$V" = "latest" ]; then \
+      V=$(curl -sI --retry 5 --retry-delay 5 --retry-all-errors "https://github.com/tealdeer-rs/tealdeer/releases/latest" | awk 'tolower($1)=="location:" { sub(/\r$/,"",$2); n=split($2,a,"/"); print a[n] }'); \
+    fi && \
+    V="${V#v}" && \
+    [ -n "$V" ] && \
+    echo "Installing tealdeer ${V}" && \
+    curl -fsSL --retry 5 --retry-delay 5 --retry-all-errors "https://github.com/tealdeer-rs/tealdeer/releases/download/v${V}/tealdeer-linux-${ARCH}-musl" -o /usr/local/bin/tldr && \
+    chmod +x /usr/local/bin/tldr && \
+    tldr --version
+
+# ── typst — lightweight PDF engine for pandoc (Markdown→PDF) ─────────
+# pandoc (apt-installed above) is only a front-end; rendering PDF needs a
+# back-end engine. Rather than a ~600 MB TeX Live install, we ship typst:
+# a single ~30 MB static Rust binary with no LaTeX dependency, used via
+# `pandoc --pdf-engine=typst`. A fuller TeX Live remains the higher-fidelity
+# fallback for anyone who needs LaTeX-exact output (install on demand).
+# Ported from pi-devbox (its v1.4.0 + v1.5.0 font-default fix).
+#
+# Follows the `latest` GitHub-release convention (like tealdeer/uv/bat).
+# typst ships a `.tar.xz` asset (hence xz-utils in the apt layer above)
+# that extracts to typst-<arch>-unknown-linux-musl/typst. Pin a specific
+# tag with --build-arg TYPST_VERSION=vX.Y.Z.
+#
+# We also patch pandoc's bundled typst template
+# (/usr/share/pandoc/data/templates/template.typst): its conf() defaults the
+# document font to an empty tuple (`font: ()`), so a naked
+# `pandoc --pdf-engine=typst` fails with "font fallback list must not be empty"
+# unless the caller passes `-V mainfont=...`. We default it to Libertinus Serif
+# (typst's own bundled default font) so PDF export works out-of-the-box.
+ARG TYPST_VERSION=latest
+RUN ARCH=$(case "${TARGETARCH}" in amd64) echo "x86_64" ;; arm64) echo "aarch64" ;; *) echo "x86_64" ;; esac) && \
+    V="${TYPST_VERSION}" && \
+    if [ "$V" = "latest" ]; then \
+      V=$(curl -sI --retry 5 --retry-delay 5 --retry-all-errors "https://github.com/typst/typst/releases/latest" | awk 'tolower($1)=="location:" { sub(/\r$/,"",$2); n=split($2,a,"/"); print a[n] }'); \
+    fi && \
+    V="${V#v}" && [ -n "$V" ] && \
+    echo "Installing typst ${V}" && \
+    curl -fsSL --retry 5 --retry-delay 5 --retry-all-errors "https://github.com/typst/typst/releases/download/v${V}/typst-${ARCH}-unknown-linux-musl.tar.xz" | tar -xJ -C /tmp && \
+    install /tmp/typst-${ARCH}-unknown-linux-musl/typst /usr/local/bin/typst && \
+    rm -rf /tmp/typst-${ARCH}-unknown-linux-musl && \
+    typst --version && \
+    sed -i 's/^  font: (),$/  font: ("Libertinus Serif",),/' /usr/share/pandoc/data/templates/template.typst && \
+    grep -q 'font: ("Libertinus Serif",),' /usr/share/pandoc/data/templates/template.typst
+
 # ── MemPalace — local-first AI memory system ─────────────────────────
 # Provides semantic search over conversation history via 29 MCP tools.
 # Always installed in the base (variant-independent). Set
@@ -384,6 +440,17 @@ ENV LANGUAGE=en_US:en
 ENV LC_ALL=en_US.UTF-8
 ENV EDITOR=nvim
 ENV PATH="/home/developer/.local/bin:/home/developer/.cargo/bin:${PATH}"
+# Enable opencode's native background subagents. opencode gates this behind an
+# experimental flag (packages/opencode/src/tool/task.ts errors with
+# "Background subagents require OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=true"
+# when unset). oh-my-opencode-slim V2+ makes background orchestration its DEFAULT
+# workflow, so the omos variant is effectively broken without this. Baked here as
+# a base ENV (applies to both variants; harmless for plain opencode — it only
+# *enables* a capability). Overridable at runtime: -e OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=false.
+# REMOVAL TRIGGER: when opencode promotes background subagents out of experimental
+# (flag becomes default / renamed), drop this ENV. No upstream roadmap date as of
+# opencode 1.17.20 / omos 2.2.0 (2026-07).
+ENV OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=true
 
 # ── Node.js (required for opencode/pi/omos at variant build + MCP servers) ──
 ARG NODE_VERSION=22
@@ -464,8 +531,26 @@ COPY rootfs/home/developer/.bash_aliases     /etc/skel-devbox/.bash_aliases
 COPY rootfs/home/developer/.inputrc          /etc/skel-devbox/.inputrc
 COPY rootfs/home/developer/.gitignore_global /etc/skel-devbox/.gitignore_global
 
+# ── Editor defaults: system-wide Neovim true-colour ──────────────────
+# /etc/xdg/nvim/sysinit.vim is Neovim's system vimrc: it loads for every user
+# (before any personal ~/.config/nvim) and can still be overridden per-user.
+# Enables termguicolors so the default theme renders in 24-bit colour instead
+# of a muddy 256-colour fallback. Pairs with kitty-terminfo (installed above).
+COPY rootfs/etc/xdg/nvim/sysinit.vim /etc/xdg/nvim/sysinit.vim
+
+# ── Terminal support: xterm-ghostty terminfo alias ──────────────────
+# ncurses-term (installed above) covers wezterm/alacritty/foot/st and the base
+# `ghostty` entry, but Ghostty connects with TERM=xterm-ghostty, for which no
+# distro packages an entry. Ship a thin alias (use=ghostty) and compile it into
+# the system terminfo db with `tic -x`, so it inherits the maintained ghostty
+# capability set. The `infocmp` check fails the build if the entry didn't land.
+COPY rootfs/usr/local/share/terminfo-src/ghostty.terminfo /usr/local/share/terminfo-src/ghostty.terminfo
+RUN tic -x -o /usr/share/terminfo /usr/local/share/terminfo-src/ghostty.terminfo && \
+    infocmp -x xterm-ghostty >/dev/null
+
 # ── Entrypoint ────────────────────────────────────────────────────────
 COPY rootfs/usr/local/lib/opencode-devbox/ /usr/local/lib/opencode-devbox/
+COPY rootfs/usr/local/bin/dot-watch /usr/local/bin/dot-watch
 # Image-baked skills + harness instruction. Under /usr/local so a named volume
 # over a home dir (e.g. devbox-opencode-config on ~/.config/opencode) can't
 # shadow them; entrypoint-user.sh links them into ~/.agents/skills/ and
@@ -475,6 +560,7 @@ COPY rootfs/usr/local/share/opencode-devbox/ /usr/local/share/opencode-devbox/
 COPY entrypoint.sh /usr/local/bin/entrypoint.sh
 COPY entrypoint-user.sh /usr/local/bin/entrypoint-user.sh
 RUN chmod +x /usr/local/bin/entrypoint.sh /usr/local/bin/entrypoint-user.sh \
+    /usr/local/bin/dot-watch \
     /usr/local/lib/opencode-devbox/*.py
 
 # Start as root — entrypoint adjusts UID/GID then drops to developer

Dockerfile.variant

@@ -39,7 +39,7 @@ ARG USER_NAME=developer
 # edit, so the cache-hit class of bug that bit pi-devbox v0.74.0..
 # v0.75.5 cannot apply here.
 ARG INSTALL_OPENCODE=true
-ARG OPENCODE_VERSION=1.17.13
+ARG OPENCODE_VERSION=1.17.20
 RUN if [ "${INSTALL_OPENCODE}" = "true" ]; then \
       NPM_CONFIG_PREFIX=/usr npm install -g opencode-ai@${OPENCODE_VERSION} && \
       opencode --version ; \

IDEAS.md

@@ -0,0 +1,60 @@
+# Ideas & backlog
+
+A living list of potential improvements for opencode-devbox that are **not yet
+scheduled**. This is intentionally lightweight — a place to park ideas so they
+aren't lost between sessions. When an item ships, describe it in
+[`CHANGELOG.md`](CHANGELOG.md) and remove it from here.
+
+Rough effort tags: 🟢 small · 🟡 medium · 🔴 large. Status: `idea` (unvetted) ·
+`planned` (agreed, not started).
+
+---
+
+## Supply-chain hardening
+
+- 🟡 `planned` — **Pin CI actions to commit SHAs.** The workflows use floating
+  major tags (`actions/checkout@v4`, `docker/build-push-action@v7`,
+  `docker/setup-buildx-action@v4`, `docker/login-action@v3`,
+  `docker/setup-qemu-action@v3`). This is inconsistent with the project's own
+  philosophy of SHA-pinning *content* refs to defeat floating refs. Pin each
+  action to a SHA with a trailing `# vX.Y.Z` comment. Pairs naturally with the
+  renovate item below to keep the pins fresh.
+
+- 🟡 `planned` — **Vulnerability scanning in CI.** No CVE scan runs on the
+  published images today. Add a `trivy image` (or grype) job to
+  `docker-publish-split.yml` after `smoke`. Start non-blocking (report only),
+  then tighten to fail on `HIGH`/`CRITICAL` with an available fix.
+
+- 🟢🟡 `planned` — **Standardize build provenance → buildx SBOM + attestations.**
+  The image already carries hand-rolled provenance (OCI labels +
+  `build-manifest`). `docker/build-push-action` can emit a standard SBOM and
+  SLSA provenance attestation nearly for free (`provenance: mode=max`,
+  `sbom: true`). Makes provenance machine-consumable and pairs well with the
+  trivy item (scan the SBOM).
+
+## Dockerfile hardening
+
+- 🟡 `idea` — **Address hadolint DL4006 properly.** Currently ignored in
+  `.hadolint.yaml`. The clean fix is `SHELL ["/bin/bash", "-o", "pipefail",
+  "-c"]` so piped `RUN`s fail on the first non-zero stage. This changes the
+  default `RUN` shell from `sh` to `bash` for all subsequent layers, so it is
+  base-affecting and needs a careful pass over existing `RUN`s before removing
+  the ignore.
+
+## Developer experience
+
+- 🟢 `idea` — **`Makefile`/`justfile` for local iteration.** Reproducing a CI
+  build locally means hand-assembling many `--build-arg`s. Thin targets
+  (`make build-base`, `make build-variant`, `make smoke`, `make lint`) would
+  make local testing painless and document the canonical invocations.
+
+- 🟡 `idea` — **Dependency-update automation (renovate).** With CI actions
+  SHA-pinned (above), a `renovate.json` keeps those pins — plus the pinned tool
+  versions (`ACTIONLINT_VERSION`, `HADOLINT_VERSION`, gosu, etc.) — current via
+  automated PRs. Requires a renovate runner against the Gitea instance.
+
+## Housekeeping
+
+- 🟢 `idea` — **Registry retention for `base-<hash>` tags.** The base-hash
+  caching scheme accumulates `base-<hash>` tags over time. Confirm whether the
+  registry prunes old ones, and add a retention/cleanup step if not.

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Joakim Persson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -148,6 +148,7 @@ docker compose exec -u developer devbox aws --version
 | `OMOS_TMUX` | Enable tmux pane integration for OMOS | `false` |
 | `OMOS_SKILLS` | Symlink bundled OMOS skills from the image into `~/.agents/skills/` each start | `true` |
 | `OMOS_RESET` | Force regenerate OMOS config on next start (does not affect skills) | `false` |
+| `OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS` | Enable opencode's native background subagents. Baked on in the image because OMOS V2+ default orchestration depends on it. Set `false` to opt out. opencode marks this **experimental** — see [AGENTS.md](AGENTS.md) removal trigger | `true` |
 | `SKILLSET_CONTAINER_PATH` | Path to skillset repo inside container (for auto-deploy when not at /workspace/skillset) | Auto-detect |
 
 ### Reaching your LAN from the container
@@ -263,11 +264,23 @@ volumes:
   - ~/.config/nvim:/home/developer/.config/nvim:ro
 ```
 
+24-bit colour is on by default — a system-wide `sysinit.vim` (in `/etc/xdg/nvim/`) enables `termguicolors` so strings and comments render in full colour over SSH instead of a muddy 256-colour palette. It loads before any personal config and stays overridable per-user (`:set notermguicolors`, or your own `~/.config/nvim/init`).
+
 > **Not a vi person?** The image also ships two non-modal editors alongside nvim:
 > **nano** (classic, minimal) and **micro** (modern — desktop-style `Ctrl+S`/`Ctrl+Q`
 > keys, mouse, syntax highlighting). `EDITOR` stays `nvim`; opt in per-shell with
 > `export EDITOR=nano` (or `micro`), or for git with `git config --global core.editor micro`.
 
+### Document conversion (Markdown → PDF)
+
+The image ships [`pandoc`](https://pandoc.org/) with [`typst`](https://typst.app/) as the PDF engine, so Markdown → PDF works out of the box with no LaTeX install:
+
+```bash
+pandoc README.md -o readme.pdf --pdf-engine=typst
+```
+
+The bundled pandoc typst template defaults the font to `Libertinus Serif`, so a bare `--pdf-engine=typst` renders without needing `-V mainfont`. For higher-fidelity or complex layouts, install TeX Live on demand and use `--pdf-engine=xelatex` instead.
+
 ### Python development with uv
 
 The image includes Python 3.13 (from Debian Trixie) and [uv](https://docs.astral.sh/uv/), a fast Python package manager that replaces pip, venv, and pyenv:
@@ -439,7 +452,7 @@ Enable optional language runtimes, pin a specific opencode version, or lock any
 
 ```bash
 docker compose build --build-arg INSTALL_GO=true
-docker compose build --build-arg OPENCODE_VERSION=1.5.0
+docker compose build --build-arg OPENCODE_VERSION=1.17.20
 docker compose build --build-arg NVIM_VERSION=0.12.1   # pin to a specific version
 ```
 
@@ -452,7 +465,7 @@ docker compose build --build-arg NVIM_VERSION=0.12.1   # pin to a specific versi
 | `INSTALL_OPENCODE` | `true` | Install opencode. Set `false` to build a base with no harness (still includes Bun if `INSTALL_OMOS=true`). |
 | `OPENCODE_VERSION` | *(pinned per release)* | opencode npm version. Drives the image tag and is intentionally not floated. |
 | `NODE_VERSION` | `22` | Node.js major version. Pinned to protect against upstream breaking changes across majors. |
-| `GOSU_VERSION`, `FZF_VERSION`, `GIT_LFS_VERSION`, `NVIM_VERSION`, `BAT_VERSION`, `EZA_VERSION`, `ZOXIDE_VERSION`, `UV_VERSION`, `GITEA_MCP_VERSION`, `GO_VERSION`, `OMOS_VERSION` | `latest` | All GitHub/Gitea/go.dev-hosted binaries resolve to the newest upstream release at build time. Override with a specific version to pin. Resolved versions are logged in CI output. |
+| `GOSU_VERSION`, `FZF_VERSION`, `GIT_LFS_VERSION`, `NVIM_VERSION`, `BAT_VERSION`, `EZA_VERSION`, `ZOXIDE_VERSION`, `UV_VERSION`, `GITEA_MCP_VERSION`, `GO_VERSION`, `OMOS_VERSION`, `MICRO_VERSION`, `TEALDEER_VERSION`, `TYPST_VERSION` | `latest` | All GitHub/Gitea/go.dev-hosted binaries resolve to the newest upstream release at build time. Override with a specific version to pin. Resolved versions are logged in CI output. |
 
 > **Reproducibility note:** With `latest` defaults, two builds of the same `v{opencode}` tag may embed different tool versions if upstream releases have happened in between. This is intentional — it means every rebuild picks up upstream CVE fixes automatically. If you need a bit-for-bit reproducible build, pass explicit `*_VERSION` args. The CI smoke test logs the resolved versions for every release build.
 
@@ -670,7 +683,7 @@ docker build -f Dockerfile.base -t myorg/opencode-devbox:base-dev \
 # then the variant FROM that base
 docker build -f Dockerfile.variant -t myorg/opencode-devbox:dev \
   --build-arg BASE_IMAGE=myorg/opencode-devbox:base-dev \
-  --build-arg OPENCODE_VERSION=1.17.8 .
+  --build-arg OPENCODE_VERSION=1.17.20 .
 ```
 
 Note: mempalace-toolkit clones anonymously (no token needed). Only the `resolve-versions` CI job calls the gitea API (which needs a token for public repos). A plain `docker build` like the above skips that job entirely, so no credentials are required.
@@ -760,6 +773,7 @@ Defaults you get out of the box:
 - **Aliases** — `ls`/`ll`/`la` use `eza`, `cat` uses `bat`, `gs`/`gd`/`gl` for git, safe `rm`/`mv`/`cp`.
 - **Integrations** — `zoxide` (`z <fragment>` to jump), `fzf` Ctrl-R / Ctrl-T key bindings.
 - **Prompt marker** — `[devbox]` prefix so it's always obvious you're inside the container.
+- **Host SSH reachability check** — on the first shell of a freshly (re)created container, a one-time probe checks whether the Docker host is reachable over SSH. If it isn't (host Remote Login off, or the container's `devbox_jump` key not yet authorized), it prints a clear two-step fix with the container's public key inline; it stays silent once SSH works and is skipped on later shells.
 
 ### Overriding the defaults
 
@@ -793,6 +807,14 @@ cp /etc/skel-devbox/.bash_aliases ~/.bash_aliases
 rm ~/.bash_aliases
 ```
 
+## Terminal compatibility
+
+The base ships `ncurses-term` and `kitty-terminfo` on top of the default `ncurses-base`, plus a compiled `xterm-ghostty` alias, so modern terminal emulators resolve their `TERM` correctly over SSH instead of degrading to a dumb fallback. Covered out of the box: WezTerm, Alacritty, foot, st, kitty (`xterm-kitty`), Ghostty (`xterm-ghostty`), and iTerm2 / xterm (`xterm-256color`).
+
+## Global gitignore
+
+The image bakes a `~/.gitignore_global` and wires it via `git config --global core.excludesFile`, so personal/tooling artifacts are ignored across every repo in the container without per-repo `.gitignore` entries. Seeded patterns include `*.bak`, `*.bak.*`, `*~`, `*.orig`, `*.swp`, `*.tmp`, and `**/.claude/settings.local.json` (Claude Code's per-machine settings, which can carry credentials). It is seeded only if absent — edit it freely, and your version survives recreate — and the `core.excludesFile` wiring is skipped if you already set one.
+
 ## Secret Scanning
 
 A [gitleaks](https://github.com/gitleaks/gitleaks) pre-commit hook prevents accidentally committing API keys, passwords, or other secrets.
@@ -835,7 +857,11 @@ Container (Debian trixie)
 ├── oh-my-opencode-slim (optional — multi-agent orchestration plugin, includes Bun)
 ├── AWS CLI v2 (SSO + Bedrock auth)
 ├── neovim 0.12, nano, micro, tmux, htop, bat, eza, zoxide, uv, rustup, make, gcc, g++, rsync
-├── git, git-crypt, age, gitleaks, ssh, ripgrep, fd, fzf, jq, curl, tree
+├── git, git-crypt, age, gitleaks, ssh, ripgrep, fd, fzf, jq, yq, curl, tree
+├── pandoc + typst (Markdown→PDF via --pdf-engine=typst; HTML/etc.)
+├── graphviz (dot diagram rendering)
+├── tldr (tealdeer — quick command examples)
+├── dot-watch (auto-render .dot to PNG on save)
 ├── Node.js (for MCP servers)
 ├── Bun (optional — included with oh-my-opencode-slim)
 ├── entrypoint.sh (UID adjustment, git config, provider setup)
@@ -864,4 +890,4 @@ Container (Debian trixie)
 
 ## License
 
-MIT
+MIT — see [`LICENSE`](LICENSE). The MIT license covers this repository's own contents (Dockerfiles, entrypoint scripts, `rootfs/` seeds, CI workflows, docs). The **published container images** additionally *bundle* third-party software, each under its own terms — see [`THIRD_PARTY.md`](THIRD_PARTY.md) for the summary.

THIRD_PARTY.md

@@ -0,0 +1,48 @@
+# Third-party notices
+
+opencode-devbox is distributed under the MIT License (see [`LICENSE`](LICENSE)),
+which covers **this repository's own contents** — the Dockerfiles, entrypoint
+scripts, `rootfs/` seeds, CI workflows, and docs.
+
+The **published container images** (`joakimp/opencode-devbox:*`) additionally
+*bundle* third-party software, each of which remains under its own license. This
+file is a good-faith summary; the authoritative sources are the upstream
+projects and, for OS packages, the per-package copyright files inside the image
+at `/usr/share/doc/<package>/copyright`.
+
+## opencode and agent components (installed in the variant layer)
+
+| Component | Upstream | License |
+| --- | --- | --- |
+| opencode | github.com/sst/opencode | MIT |
+| oh-my-opencode-slim (OMOS) *(`-omos` variant only)* | npm | MIT |
+| mempalace / mempalace-toolkit | authored by the maintainer (Joakim Persson) | MIT |
+| gitea-mcp | gitea.com/gitea/gitea-mcp | MIT |
+
+## Tooling baked into the base image
+
+| Component | Upstream | License (best effort) |
+| --- | --- | --- |
+| gosu | github.com/tianon/gosu | Apache-2.0 |
+| Node.js | nodejs.org | MIT (bundles components under their own licenses) |
+| uv | github.com/astral-sh/uv | Apache-2.0 OR MIT |
+| Neovim | neovim.io | Apache-2.0 + Vim license |
+| micro | github.com/zyedidia/micro | MIT |
+| Pandoc | pandoc.org | GPL-2.0-or-later |
+| Typst | github.com/typst/typst | Apache-2.0 |
+| Graphviz | graphviz.org | CPL-1.0 |
+| ripgrep / fd / bat / eza / zoxide / tealdeer / yq (mikefarah) | respective repos | MIT / Apache-2.0 / Unlicense (varies) |
+| bun *(`-omos` variant only)* | github.com/oven-sh/bun | MIT |
+
+## Base OS
+
+The image is built `FROM` a Debian base and installs packages via `apt`. Debian
+and its packages are distributed under their respective licenses (GPL, LGPL,
+MIT, BSD, and others). See each package's copyright file in the image under
+`/usr/share/doc/<package>/copyright`.
+
+---
+
+*Licenses marked "best effort" are widely known but were not each verified at
+the exact bundled version; consult the upstream project for authoritative
+terms. Corrections welcome.*

rootfs/etc/xdg/nvim/sysinit.vim

@@ -0,0 +1,18 @@
+" opencode-devbox — system-wide Neovim defaults.
+"
+" This is Neovim's *system vimrc*: it loads for every user before any personal
+" ~/.config/nvim, and personal configs can still override it.
+"
+" Enable 24-bit ("true") colour. Without it, Neovim's default theme is squeezed
+" into a 256-colour palette where strings/comments become a muddy, low-contrast
+" dark colour — a common complaint over ssh/kitty where COLORTERM often isn't
+" propagated into the container. Modern terminals (kitty, WezTerm, iTerm2,
+" Alacritty, ...) all support true colour; the bundled kitty-terminfo also lets
+" Neovim auto-detect it, but forcing it here guarantees readable colour
+" regardless of how the terminal type / COLORTERM reach the container.
+"
+"   Opt out for a session:  :set notermguicolors
+"   Override permanently:   set your own value in ~/.config/nvim/init.lua
+if has('termguicolors')
+  set termguicolors
+endif

rootfs/home/developer/.bash_aliases

@@ -54,6 +54,38 @@ alias gs='git status'
 alias gd='git diff'
 alias gl='git log --oneline --graph --decorate -20'
 
+# ── Host SSH reachability check (once per container lifetime) ─────────────
+# Warns at first shell startup if the Mac host is not reachable via SSH.
+# Only runs inside a container, only if the jump key exists, and only once
+# per container lifetime (/tmp flag is cleared on recreate).
+_devbox_check_host_ssh() {
+  [ -f "/.dockerenv" ] || return 0
+  local ssh_cfg="$HOME/.ssh-local/config"
+  [ -f "$ssh_cfg" ] || return 0
+  local key_pub="$HOME/.ssh-local/devbox_jump_ed25519.pub"
+  [ -f "$key_pub" ] || return 0
+  local flag="/tmp/.devbox_host_ssh_ok"
+  [ -f "$flag" ] && return 0
+  if ssh -F "$ssh_cfg" \
+        -o BatchMode=yes \
+        -o ConnectTimeout=2 \
+        -o StrictHostKeyChecking=accept-new \
+        mac true 2>/dev/null; then
+    touch "$flag"
+    return 0
+  fi
+  local pub_key
+  pub_key=$(cat "$key_pub")
+  printf '\n\033[1;33m⚠  devbox: Mac host not reachable via SSH\033[0m\n'
+  printf '   Some tools use SSH to run commands on the Mac host.\n'
+  printf '   Fix (run both on the Mac):\n\n'
+  printf '   \033[1mStep 1\033[0m  System Settings → General → Sharing → Remote Login → ON\n\n'
+  printf '   \033[1mStep 2\033[0m  echo '"'"'%s'"'"' >> ~/.ssh/authorized_keys\n' "$pub_key"
+  printf '\n   Then open a new shell in the container to verify.\n\n'
+}
+_devbox_check_host_ssh
+unset -f _devbox_check_host_ssh
+
 # ── LAN access via the host (dssh) ───────────────────────────────────
 # When running on a VM-backed host (macOS OrbStack / Docker Desktop), the
 # entrypoint's setup-lan-access.sh generates ~/.ssh-local/config so the host

rootfs/home/developer/.gitignore_global

@@ -9,3 +9,7 @@
 *.orig
 *.swp
 *.tmp
+
+# Claude Code per-machine local settings: holds machine-specific permissions
+# and can carry credentials — must never be committed.
+**/.claude/settings.local.json

rootfs/usr/local/bin/dot-watch

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+# dot-watch — auto-rerender a graphviz .dot file to PNG on every save.
+#
+# WHY THIS EXISTS
+#   pi-studio renders mermaid natively but has no graphviz/DOT renderer.
+#   Its markdown preview DOES render local image links (.png/.jpg/.gif/.webp),
+#   and the editor offers "refresh from disk". This helper closes the loop:
+#   edit a .dot file -> dot-watch regenerates <name>.png -> hit refresh in
+#   Studio to see the update. Uses mtime polling (no inotify dependency,
+#   which isn't in the trixie-slim base).
+#
+# USAGE
+#   dot-watch <file.dot> [layout] [dpi]
+#     layout: dot|neato|fdp|circo|twopi  (default: dot)
+#     dpi:    output resolution           (default: 150)
+#   env: DOT_WATCH_INTERVAL=<seconds>     poll interval (default: 1)
+#
+# EXAMPLES
+#   dot-watch /workspace/graph.dot
+#   dot-watch graph.dot neato 200
+
+set -euo pipefail
+
+SRC="${1:?usage: dot-watch <file.dot> [layout] [dpi]}"
+LAYOUT="${2:-dot}"
+DPI="${3:-150}"
+
+[[ -f "$SRC" ]] || { echo "error: no such file: $SRC" >&2; exit 1; }
+command -v "$LAYOUT" >/dev/null || { echo "error: layout engine '$LAYOUT' not found" >&2; exit 1; }
+
+OUT="${SRC%.dot}.png"
+INTERVAL="${DOT_WATCH_INTERVAL:-1}"   # seconds between polls
+ERRLOG="$(mktemp -t dot-watch.XXXXXX.err)"
+trap 'rm -f "$ERRLOG"' EXIT
+
+render() {
+    if "$LAYOUT" -Tpng -Gdpi="$DPI" "$SRC" -o "$OUT" 2> "$ERRLOG"; then
+        printf '[%s] rendered -> %s\n' "$(date +%H:%M:%S)" "$OUT"
+    else
+        printf '[%s] DOT error:\n' "$(date +%H:%M:%S)"
+        sed 's/^/    /' "$ERRLOG"
+    fi
+}
+
+# portable mtime (GNU stat, fallback to BSD stat)
+mtime() { stat -c %Y "$1" 2>/dev/null || stat -f %m "$1" 2>/dev/null; }
+
+echo "watching $SRC ($LAYOUT, ${DPI}dpi) -> $OUT  [Ctrl-C to stop]"
+render
+last="$(mtime "$SRC")"
+while true; do
+    sleep "$INTERVAL"
+    [[ -f "$SRC" ]] || continue
+    now="$(mtime "$SRC")"
+    if [[ "$now" != "$last" ]]; then
+        last="$now"
+        render
+    fi
+done

rootfs/usr/local/lib/opencode-devbox/generate-config.py

@@ -41,11 +41,9 @@ from pathlib import Path
 
 # Default model per provider. Update here when upstream changes.
 DEFAULT_MODELS: dict[str, str] = {
-    "anthropic": "anthropic/claude-sonnet-4-6",
+    "anthropic": "anthropic/claude-sonnet-5",
     "openai": "openai/gpt-5.4",
-    "amazon-bedrock": (
+    "amazon-bedrock": "amazon-bedrock/global.anthropic.claude-sonnet-5",
-        "amazon-bedrock/global.anthropic.claude-sonnet-4-5-20250929-v1:0"
-    ),
 }
 
 # Fallback when OPENCODE_PROVIDER is set but not recognized.

rootfs/usr/local/share/terminfo-src/ghostty.terminfo

@@ -0,0 +1,14 @@
+# xterm-ghostty — alias of the maintained ncurses `ghostty` terminfo entry.
+#
+# Ghostty sets TERM=xterm-ghostty by default, but the ncurses terminfo
+# database (Debian: ncurses-term) ships the entry under the name `ghostty`
+# only — there is no `xterm-ghostty` alias, and no distro packages one. This
+# thin alias makes xterm-ghostty resolve to the same upstream-maintained
+# capability set, so SSH sessions from a Ghostty terminal work without
+# vendoring Ghostty's full (Zig-generated) terminfo here.
+#
+# `use=ghostty` is resolved by `tic` at compile time against the base
+# `ghostty` entry from ncurses-term (installed in Dockerfile.base before the
+# compile step). Compiled with `tic -x`.
+xterm-ghostty|Ghostty terminal emulator (xterm-ghostty alias),
+	use=ghostty,

scripts/smoke-test.sh

@@ -8,6 +8,10 @@
 #   - Entrypoint runs cleanly as non-root after UID adjustment
 #   - Generated opencode.json has the expected shape
 #   - MCP wrapper works (when mempalace is installed)
+#   - typst PDF engine for pandoc — `pandoc --pdf-engine=typst`
+#   - terminfo for modern emulators: xterm-kitty, xterm-ghostty, wezterm,
+#     alacritty, foot (kitty-terminfo + ncurses-term + compiled ghostty alias)
+#   - Neovim true-colour default (sysinit.vim termguicolors)
 #
 # Usage: ./scripts/smoke-test.sh <image> [--variant base|omos]
 #
@@ -119,6 +123,10 @@ run "node"              "node --version"
 run "npm"               "npm --version"
 run "git"               "git --version"
 run "nvim"              "nvim --version | head -1"
+run "nvim true-colour default (sysinit.vim)" "nvim --headless -c 'lua os.exit(vim.o.termguicolors and 0 or 1)'"
+run "kitty-terminfo"    "infocmp -x xterm-kitty >/dev/null 2>&1"
+run "terminfo: modern emulators (ncurses-term)" 'for t in wezterm alacritty foot ghostty st-256color; do infocmp -x "$t" >/dev/null 2>&1 || exit 1; done'
+run "terminfo: xterm-ghostty alias (tic)" "infocmp -x xterm-ghostty >/dev/null 2>&1"
 run "nano"              "nano --version | head -1"
 run "micro"             "micro --version"
 run "bat"               "bat --version"
@@ -131,12 +139,24 @@ run "fzf"               "fzf --version"
 run "fd"                "fd --version"
 run "rg"                "rg --version | head -1"
 run "jq"                "jq --version"
+run "yq"                "yq --version"
 run "git-crypt"         "git-crypt --version | head -1"
 run "gitleaks"          "gitleaks version"
 run "aws"               "aws --version"
 run "gitea-mcp"         "gitea-mcp --version"
 run "gosu"              "gosu --version"
 run "tmux"              "tmux -V"
+run "pandoc"            "pandoc --version | head -1"
+run "typst"             "typst --version"
+run "pandoc+typst PDF engine" "printf '# hi\n' | pandoc --pdf-engine=typst -o /tmp/_smoke.pdf - && test -s /tmp/_smoke.pdf; rm -f /tmp/_smoke.pdf"
+run "graphviz (dot)"    "dot -V"
+run "tldr (tealdeer)"   "tldr --version"
+run "dot-watch"         "test -x /usr/local/bin/dot-watch && bash -n /usr/local/bin/dot-watch && echo ok"
+
+# Background subagents: opencode gates them behind this experimental env var,
+# and OMOS V2+ default orchestration depends on it. Baked ON as an ENV in
+# Dockerfile.base — assert it's present in the image environment (both variants).
+run_expect "bg-subagents env baked" "printenv OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS" "true"
 
 # SSH ControlMaster baked defaults: the config file must exist (image-level)
 # and ssh -G must report ControlPath rooted at /tmp/sshcm/ for an arbitrary
@@ -376,8 +396,15 @@ echo "  Uncompressed size: ${SIZE_MB} MB"
 # ~250 MB headroom avoids a partial-publish + letter-suffix recovery cycle.
 # CI's smoke size print + resolved-versions table records the actual landed
 # sizes; tighten later if they come in low.
-THRESHOLD=2750
+# v2.6.0: bumped +200 MB (2750->2950 base, 3450->3650 omos). The pi-devbox
-[ "$VARIANT" = "omos" ] && THRESHOLD=3450
+# CLI-parity additions (pandoc ~150 MB + graphviz ~40 MB + tealdeer ~5 MB, all
+# on the base layer) consumed almost all of the ~250 MB headroom v1.16.2 had
+# restored — v2.6.0 passed 2750/3450 but with a slim margin. Restoring ~250 MB
+# headroom keeps the guardrail catching *runaway* growth (accidental texlive/
+# chrome bake-in) rather than tripping on routine apt drift or a minor opencode
+# bump. smoke still prints the actual landed size each run; tighten if low.
+THRESHOLD=2950
+[ "$VARIANT" = "omos" ] && THRESHOLD=3650
 if [ "$SIZE_MB" -gt "$THRESHOLD" ]; then
   fail "image size ${SIZE_MB} MB exceeds threshold ${THRESHOLD} MB for variant=$VARIANT"
 else