pi-devbox/Dockerfile.variant

# pi-devbox — variant image
#
# FROMs a base-<hash> image produced by Dockerfile.base and adds only
# the variant-specific tools — currently just the pi install. Kept as a
# separate file (rather than collapsed into Dockerfile.base) so future
# variants (e.g. studio, studio-tex) can FROM the variant or extend
# this Dockerfile with additional build args without rebuilding the
# base on every pi version bump.
#
# Pass `--build-arg BASE_IMAGE=<repo>:base-<hash>` to select the base.
# CI computes the base hash from Dockerfile.base + rootfs/ +
# entrypoint*.sh and feeds it in.
#
# IMPORTANT: the base image sets NPM_CONFIG_PREFIX to
# /home/developer/.pi/npm-global so runtime `pi install npm:...` and
# `npm install -g` by the developer user lands on the named volume.
# At BUILD time we want the baked binaries on /usr so they survive the
# volume mount. Each `npm install -g` below therefore prefixes the
# command with `NPM_CONFIG_PREFIX=/usr`.

ARG BASE_IMAGE
FROM ${BASE_IMAGE}

ARG TARGETARCH
ARG USER_NAME=developer

# ── pi coding-agent + companions ─────────────────────────────────────
# pi-toolkit and pi-extensions are cloned into /opt/. entrypoint-user.sh
# runs each repo's install.sh on container start so symlinks land under
# ~/.pi/agent/ on the named volume.
#
# ── pi version pin: an AUDITED CHECKPOINT, not a freeze ──────────────
# PI_VERSION is pinned to a version whose upstream CHANGELOG has been read
# against this image's integration surface: the theme/TUI API that pi-atelier
# couples to, the session `.jsonl` format that `pi-session-repair` parses, the
# extension/package loader, and the Node engine floor. CI reads THIS LINE as
# the single source of truth (see the `resolve-versions` job) and no longer
# follows npm `latest` — following it meant every release silently adopted
# whatever pi shipped that morning, unaudited, in the very build that then got
# tagged and published.
#
# BUMPING IS ROUTINE AND EXPECTED — the pin exists to force a look, not to
# hold a version forever:
#   1. Read the upstream CHANGELOG for every version between old and new.
#   2. Re-check the companions that couple to pi's private TUI/renderer
#      internals — pi-atelier above all (see PI_ATELIER_REF below for the
#      0.6.0-under-pi-0.84 startup-hang precedent).
#   3. Bump this line, record the audit in CHANGELOG.md, then tag.
# CI fails the build if this pin is not a published npm version, and warns —
# without adopting it — when npm `latest` has moved ahead. That warning is the
# prompt to do step 1; it is not something to silence.
#
# A concrete version here ALSO defeats the registry-buildcache cache-hit
# footgun that `latest` carried: a byte-identical build-arg string produced an
# identical layer hash, so the cache reused the layer from whatever pi was
# current when it was first populated (shipped the same bytes for pi-devbox
# v0.74.0..v0.75.5; discovered + fixed in v0.75.5b, 2026-05-23). The `latest`
# branch below is kept only for a deliberate local `docker build` override.
#
# AUDITED AT 0.84.3 (2026-08-25, was 0.84.2): upstream's notes carry a
# "Breaking Changes" heading — `GoogleThinkingLevel` renamed to
# `GoogleApiThinkingLevel`. INERT FOR THIS IMAGE: all four vendored companions
# (/opt/pi-fork, /opt/pi-observational-memory, /opt/pi-atelier, /opt/pi-studio)
# were grepped for that symbol and reference it ZERO times, so nothing here
# couples to the renamed type. Recorded because the heading will look alarming
# to the next reader doing step 1 above — the audit is done, don't redo it.
# Adopted for two fixes that land squarely on this repo's own vendored-skill
# wiring (see devbox-skill-reconcile, v1.8.5): nested Markdown skills inside
# `.agents/skills/<group>/` directories were not discovered, and root Markdown
# files such as README.md / AGENTS.md inside a skill dir were reported as
# broken skills unless they declared valid skill frontmatter.
# pi-atelier needs no companion bump: v0.8.2 clears the >=0.7.1 floor that
# pi >= 0.84 requires (see PI_ATELIER_REF below).
ARG PI_VERSION=0.84.3
ARG PI_TOOLKIT_REF=main
ARG PI_EXTENSIONS_REF=main
# Repo URLs default to the canonical gitea origin but are overridable so a
# relocated/forked build can clone from a mirror or a different host
# without editing this Dockerfile — same pattern as PI_FORK_REPO /
# PI_OBSMEM_REPO / PI_STUDIO_REPO below.
ARG PI_TOOLKIT_REPO=https://gitea.jordbo.se/joakimp/pi-toolkit.git
ARG PI_EXTENSIONS_REPO=https://gitea.jordbo.se/joakimp/pi-extensions.git
# pi-fork (fork tool) + pi-observational-memory (recall tool) live on GitHub
# under elpapi42. CI resolves these to commit SHAs to defeat the same
# cache-hit footgun that affects PI_VERSION.
ARG PI_FORK_REPO=https://github.com/elpapi42/pi-fork.git
ARG PI_FORK_REF=master
ARG PI_OBSMEM_REPO=https://github.com/elpapi42/pi-observational-memory.git
ARG PI_OBSMEM_REF=master
# pi-atelier (TUI sidebar: ordered panels, split-pane, themes) is PINNED TO A
# TAG, which CI resolves to that tag's commit SHA — same treatment as
# pi-studio, for reproducibility plus cache-busting.
#
# This floor is hard-earned. pi-atelier 0.6.0/0.7.0 wrapped pi's PRIVATE TUI
# renderer, and under pi 0.84 that wrapper recursed: pi hung at startup with
# sustained CPU. Upstream fixed the recursion in 0.7.1 and restored the
# non-overlapping split in 0.7.2 — "avoiding the recursive render path that
# caused startup hangs and sustained CPU usage". Its own peerDependencies
# still say `>=0.80.7`, which does NOT encode that floor, so nothing would
# have warned us: NEVER pair pi-atelier < 0.7.1 with pi >= 0.84. Bump this
# pin and PI_VERSION together, checking atelier's CHANGELOG for the pi
# version it claims to track.
#
# No `npm install` step, unlike pi-fork/pi-observational-memory/pi-studio:
# pi-atelier declares ZERO runtime dependencies (only peerDeps, satisfied by
# the baked pi) and has no build step — pi loads its TypeScript directly from
# the /opt checkout. Adding an install here would be a no-op that only costs
# build time.
ARG PI_ATELIER_REPO=https://github.com/michaelmjhhhh/pi-atelier.git
ARG PI_ATELIER_REF=v0.8.2
# Human-readable tag PI_ATELIER_REF was resolved from; recorded as a label.
ARG PI_ATELIER_VERSION=v0.8.2

RUN set -e && \
    # git_fetch_ref: clone-equivalent helper that accepts EITHER a branch name
    # OR a commit SHA as $ref. Uses `git fetch <ref> + checkout FETCH_HEAD`
    # which (a) works with both name and SHA forms uniformly, and (b) defeats
    # the registry-buildcache footgun when CI passes a resolved SHA. The
    # earlier helper `git_clone_retry` (using `git clone --branch`) only
    # worked with branch names — a SHA-resolved build-arg made `git clone
    # --branch <40-char-SHA>` fail with "Remote branch not found". Surfaced
    # in pi-devbox v1.0.0-rerun (run 374) 2026-06-10 and fixed by switching
    # all four clones to git_fetch_ref. Both Gitea and GitHub allow fetching
    # arbitrary commits by default (uploadpack.allowReachableSHA1InWant).
    git_fetch_ref() { \
      url="$1"; ref="$2"; dest="$3"; \
      rm -rf "$dest"; mkdir -p "$dest"; \
      git -C "$dest" init -q && git -C "$dest" remote add origin "$url" && \
      for i in 1 2 3 4 5; do \
        if git -C "$dest" fetch --depth 1 origin "$ref" && git -C "$dest" checkout -q FETCH_HEAD; then return 0; fi; \
        echo "git fetch $url@$ref failed (attempt $i/5), retrying in $((i*5))s..."; \
        sleep $((i*5)); \
      done; \
      return 1; \
    } && \
    if [ "${PI_VERSION}" = "latest" ]; then \
      NPM_CONFIG_PREFIX=/usr npm install -g @earendil-works/pi-coding-agent ; \
    else \
      NPM_CONFIG_PREFIX=/usr npm install -g @earendil-works/pi-coding-agent@${PI_VERSION} ; \
    fi && \
    pi --version && \
    git_fetch_ref   "${PI_TOOLKIT_REPO}"    "${PI_TOOLKIT_REF}"    /opt/pi-toolkit && \
    git_fetch_ref   "${PI_EXTENSIONS_REPO}" "${PI_EXTENSIONS_REF}" /opt/pi-extensions && \
    git_fetch_ref   "${PI_FORK_REPO}"   "${PI_FORK_REF}"   /opt/pi-fork && \
    git_fetch_ref   "${PI_OBSMEM_REPO}" "${PI_OBSMEM_REF}" /opt/pi-observational-memory && \
    git_fetch_ref   "${PI_ATELIER_REPO}" "${PI_ATELIER_REF}" /opt/pi-atelier && \
    (cd /opt/pi-fork && npm install --omit=dev --no-audit --no-fund) && \
    (cd /opt/pi-observational-memory && npm install --omit=dev --no-audit --no-fund) && \
    echo "pi-toolkit at $(cd /opt/pi-toolkit && git rev-parse --short HEAD)" && \
    echo "pi-extensions at $(cd /opt/pi-extensions && git rev-parse --short HEAD)" && \
    echo "pi-fork at $(cd /opt/pi-fork && git rev-parse --short HEAD)" && \
    echo "pi-observational-memory at $(cd /opt/pi-observational-memory && git rev-parse --short HEAD)" && \
    echo "pi-atelier at $(cd /opt/pi-atelier && git rev-parse --short HEAD) (${PI_ATELIER_VERSION})"

# ── Image-baked skill refresh: pi-extensions (Option 1 over Option 2) ──
# rootfs ships a VENDORED snapshot of the pi-extensions skill at
# /usr/local/share/pi-devbox/skills/pi-extensions/ (the "floor" — guarantees the
# skill is always in the image). The pi-extensions PACKAGE repo now co-locates
# the canonical skill under skill/, so here — after the pinned clone — we copy
# that over the snapshot. Result: a normal build ships the fresh, package-owned
# copy (pinned + recorded in the manifest via PI_EXTENSIONS_REF); a build whose
# ref predates the skill, or a fork pointing at a mirror without it, still ships
# the committed snapshot. The skill calls ./evaluate-extension-usage.py, so it
# is copied alongside. Idempotent and cache-safe (depends only on the clone).
RUN if [ -f /opt/pi-extensions/skill/SKILL.md ]; then \
      cp /opt/pi-extensions/skill/SKILL.md \
         /usr/local/share/pi-devbox/skills/pi-extensions/SKILL.md && \
      if [ -f /opt/pi-extensions/skill/evaluate-extension-usage.py ]; then \
        cp /opt/pi-extensions/skill/evaluate-extension-usage.py \
           /usr/local/share/pi-devbox/skills/pi-extensions/evaluate-extension-usage.py ; \
      fi && \
      echo "refreshed pi-extensions skill from package @ $(cd /opt/pi-extensions && git rev-parse --short HEAD)" ; \
    else \
      echo "pi-extensions package has no skill/ at this ref — keeping vendored snapshot" ; \
    fi

# ── pi-devbox awareness: append our pointer to the global AGENTS.md ──
# pi loads a SINGLE global instruction file (~/.pi/agent/AGENTS.md), which
# pi-toolkit's install.sh re-symlinks to /opt/pi-toolkit/pi-global-AGENTS.md on
# every container start. There is no second global slot, and that file is
# root-owned (not writable by the runtime user), so we compose at BUILD time:
# append the pi-devbox managed block to pi-toolkit's file here, after the clone.
# Idempotent via a marker grep so a rebuilt layer never double-appends. This
# makes every container proactively aware of the pi-devbox-environment skill;
# the snippet itself is gated (only fires when /usr/local/lib/pi-devbox exists).
RUN if [ -f /opt/pi-toolkit/pi-global-AGENTS.md ] && \
       ! grep -q 'pi-devbox:managed-block' /opt/pi-toolkit/pi-global-AGENTS.md; then \
      printf '\n' >> /opt/pi-toolkit/pi-global-AGENTS.md && \
      cat /usr/local/share/pi-devbox/pi-global-AGENTS.append.md >> /opt/pi-toolkit/pi-global-AGENTS.md && \
      echo "appended pi-devbox block to pi-global-AGENTS.md" ; \
    else \
      echo "pi-devbox block already present or pi-global-AGENTS.md missing (skipped)" ; \
    fi

# ── Optional: pi-studio (:latest-studio variant) ─────────────────────
# pi-studio (omaclaren/pi-studio) is a pi-package + theme providing a
# two-pane browser workspace: prompt/response editor, KaTeX/Mermaid live
# preview, and tmux-backed literate REPLs. Off by default; the studio
# variant sets INSTALL_STUDIO=true.
#
# Vendored to /opt/pi-studio and registered at container start by
# entrypoint-user.sh via `pi install /opt/pi-studio` — the SAME pattern
# as pi-fork / pi-observational-memory above. We deliberately do NOT run
# `pi install <git-url>` at build time: that writes into ~/.pi/agent,
# which is a named volume, so a build-time install collides with / is
# shadowed by the volume on first run. Vendoring to /opt (an image layer)
# + a runtime local-path install keeps it on the image and idempotent.
#
# No build step is needed: pi-studio ships its browser bundle prebuilt in
# git (client/studio-client.js) and pi loads index.ts directly; its
# package.json scripts are only test/typecheck. So we just fetch + install
# the 3 prod deps (@earendil-works/pi-ai, @sinclair/typebox, ws).
#
# PI_STUDIO_REF is CI-resolved to a commit SHA to defeat the registry-
# buildcache cache-hit footgun (see the PI_VERSION note above).
ARG INSTALL_STUDIO=false
ARG PI_STUDIO_REPO=https://github.com/omaclaren/pi-studio.git
ARG PI_STUDIO_REF=main
# PI_STUDIO_VERSION is the human-readable tag (e.g. v0.9.36) that PI_STUDIO_REF
# was resolved from; recorded as a label below for at-a-glance identification.
# Only meaningful for the studio variant (default `none` otherwise).
ARG PI_STUDIO_VERSION=none
RUN if [ "${INSTALL_STUDIO}" = "true" ]; then \
      set -e; \
      rm -rf /opt/pi-studio && mkdir -p /opt/pi-studio && \
      git -C /opt/pi-studio init -q && \
      git -C /opt/pi-studio remote add origin "${PI_STUDIO_REPO}" && \
      ok=0; for i in 1 2 3 4 5; do \
        if git -C /opt/pi-studio fetch --depth 1 origin "${PI_STUDIO_REF}" && \
           git -C /opt/pi-studio checkout -q FETCH_HEAD; then ok=1; break; fi; \
        echo "git fetch pi-studio@${PI_STUDIO_REF} failed (attempt $i/5), retrying in $((i*5))s..."; \
        sleep $((i*5)); \
      done; \
      [ "$ok" = "1" ] && \
      (cd /opt/pi-studio && npm install --omit=dev --no-audit --no-fund) && \
      echo "pi-studio at $(cd /opt/pi-studio && git rev-parse --short HEAD)"; \
    fi

# STUDIO_PORT: advisory default consumed by docker-compose port publishing
# and the recommended `/studio --no-browser --port "$STUDIO_PORT"` launch.
# Harmless in the non-studio variant. NOTE: pi-studio hard-binds the server
# to 127.0.0.1 inside the container (index.ts: .listen(port,"127.0.0.1")),
# so reaching it from a browser needs a loopback bridge or host networking —
# see the "Using pi-studio" section in README.md.
ENV STUDIO_PORT=8765

# ── Optional: Go toolchain ───────────────────────────────────────────
# Off by default; opt in for users who run Go tools inside the devbox.
ARG INSTALL_GO=false
ARG GO_VERSION=latest
RUN if [ "${INSTALL_GO}" = "true" ]; then \
      GOARCH=$(case "${TARGETARCH}" in amd64) echo "amd64" ;; arm64) echo "arm64" ;; *) echo "amd64" ;; esac) && \
      V="${GO_VERSION}" && \
      if [ "$V" = "latest" ]; then \
        V=$(curl -fsSL --retry 5 --retry-delay 5 --retry-all-errors "https://go.dev/dl/?mode=json" | \
            awk -F'"' '/"version":/ { sub(/^go/,"",$4); print $4; exit }'); \
      fi && \
      [ -n "$V" ] && \
      echo "Installing Go ${V}" && \
      curl -fsSL --retry 5 --retry-delay 5 --retry-all-errors "https://go.dev/dl/go${V}.linux-${GOARCH}.tar.gz" | tar -C /usr/local -xz && \
      ln -s /usr/local/go/bin/go /usr/local/bin/go && \
      ln -s /usr/local/go/bin/gofmt /usr/local/bin/gofmt; \
    fi

# ── Build provenance: OCI labels + on-disk build manifest ────────────
# Records exactly which pi version and companion-repo commits were baked
# into THIS image, so a published tag is self-describing and reproducible
# after the fact (CI logs rotate; a released image must not depend on
# them). Previously the resolved SHAs only ever reached the CI build log.
#
# These ARGs are declared LAST, immediately before the layer that uses
# them, so a changing BUILD_DATE / RELEASE_TAG / SOURCE_REVISION never
# invalidates the expensive pi-install / clone layers above.
ARG RELEASE_TAG=dev
ARG BUILD_DATE=
ARG SOURCE_REVISION=
# MEMPALACE_TOOLKIT_REF is consumed in Dockerfile.base; re-declared here
# only so its intended ref lands in the label set alongside the others.
ARG MEMPALACE_TOOLKIT_REF=main
# ── Vendored skill provenance ─────────────────────────────────────────
# The vendored mempalace SKILL.md is the ONLY baked artefact with no /opt
# clone behind it: its upstream (the skillset repo) is PRIVATE, so the
# image cannot clone it and CI cannot resolve its HEAD (see VENDORED.md).
# Consequence through v1.8.7: the snapshot was ANONYMOUS — nothing in the
# image or the repo recorded which skillset commit it was taken from, so
# the only staleness check available was a hand-maintained phrase canary in
# scripts/smoke-test.sh, which by construction can only detect "older than
# what I remembered to pin", never "older than skillset main".
#
# Recording the ref costs nothing and makes the question answerable. It is
# deliberately a plain ARG DEFAULT rather than a CI-resolved output:
#   * the value is a fact about the committed snapshot, so it belongs in
#     the tree next to it — not in a workflow that a local `docker build`
#     never runs (same reasoning as MEMPALACE_VERSION living in
#     Dockerfile.base rather than being duplicated in docker-publish.yml);
#   * CI therefore needs NO new build-arg at any of its four
#     Dockerfile.variant call sites (smoke, smoke-studio, build-variant,
#     build-variant-studio) — a plumbing change that is easy to
#     under-apply to only two of them;
#   * and it needs no credential for a private repo.
# Bump it with scripts/vendor-mempalace-skill.sh, which refreshes the file
# and rewrites this line together, so the pair cannot drift apart by hand.
# This ARG lives in Dockerfile.variant ON PURPOSE: Dockerfile.base and
# rootfs/ are both hashed into base_tag, so recording provenance here costs
# no ~67-minute base rebuild. (scripts/check-base-hash.sh scans only
# Dockerfile.base, so no folding into the base hash is required — nor would
# it be correct, since this ARG changes nothing about the base's contents.)
ARG SKILLSET_SNAPSHOT_REF=5fd0d5c406df506fd0e70977b6bd87f5fbc3b803

# Dockerfile.base sets description="pi-devbox — base image (variant-independent)"
# and every variant INHERITS it, so both published images used to advertise
# themselves on Docker Hub as the base image. A LABEL cannot branch on
# INSTALL_STUDIO, so the description arrives as a build-arg: CI passes the
# variant-specific string (see docker-publish.yml), and the default below keeps
# a plain `docker build -f Dockerfile.variant` honest rather than misleading.
ARG IMAGE_TITLE="pi-devbox"
ARG IMAGE_DESCRIPTION="pi-devbox — development container for the pi coding agent"

LABEL org.opencontainers.image.version="${RELEASE_TAG}" \
      org.opencontainers.image.revision="${SOURCE_REVISION}" \
      org.opencontainers.image.created="${BUILD_DATE}" \
      org.opencontainers.image.title="${IMAGE_TITLE}" \
      org.opencontainers.image.description="${IMAGE_DESCRIPTION}" \
      description="${IMAGE_DESCRIPTION}" \
      se.jordbo.pi-devbox.pi-version="${PI_VERSION}" \
      se.jordbo.pi-devbox.pi-toolkit-ref="${PI_TOOLKIT_REF}" \
      se.jordbo.pi-devbox.pi-extensions-ref="${PI_EXTENSIONS_REF}" \
      se.jordbo.pi-devbox.pi-fork-ref="${PI_FORK_REF}" \
      se.jordbo.pi-devbox.pi-obsmem-ref="${PI_OBSMEM_REF}" \
      se.jordbo.pi-devbox.pi-atelier-ref="${PI_ATELIER_REF}" \
      se.jordbo.pi-devbox.pi-atelier-version="${PI_ATELIER_VERSION}" \
      se.jordbo.pi-devbox.mempalace-toolkit-ref="${MEMPALACE_TOOLKIT_REF}" \
      se.jordbo.pi-devbox.pi-studio-ref="${PI_STUDIO_REF}" \
      se.jordbo.pi-devbox.pi-studio-version="${PI_STUDIO_VERSION}" \
      se.jordbo.pi-devbox.skillset-snapshot-ref="${SKILLSET_SNAPSHOT_REF}"

# The manifest is written from GROUND TRUTH — the actual checked-out HEAD
# of each /opt clone and the live `pi --version` — not merely the intended
# build-args. That way it also exposes a clone that silently resolved to
# something other than the requested ref. pi-studio is present only in the
# studio variant (JSON null otherwise).
RUN set -e; \
    mkdir -p /etc/pi-devbox; \
    rev() { git -C "$1" rev-parse HEAD 2>/dev/null || echo "unknown"; }; \
    PI_V="$(pi --version 2>/dev/null | head -n1 | tr -d '\r\n')"; \
    # mempalace CORE (the PyPI package behind the MCP tools) is installed in
    # Dockerfile.base via `uv tool install`, so no /opt clone reveals it and
    # until v1.8.6 the manifest could not answer "which palace shipped here?" —
    # a palace bug could not be correlated to an image, which is precisely the
    # correlation this file exists to provide. Read from the INSTALLED BINARY,
    # not from ARG MEMPALACE_VERSION, per the ground-truth rule above: that is
    # what catches an install which resolved to something other than the pin.
    # `mempalace --version` prints "MemPalace 3.7.1" — NAME-PREFIXED, unlike
    # pi's bare "0.84.2" — hence the $NF pick rather than a straight read. The
    # leading-digit test then rejects usage/error text (a renamed flag prints a
    # usage block) and degrades to JSON null, so this can never fail the build.
    MP_V="$(mempalace --version 2>/dev/null | head -n1 | tr -d '\r' | awk '{print $NF}')"; \
    case "$MP_V" in [0-9]*) MP_CORE="\"${MP_V}\"" ;; *) MP_CORE='null' ;; esac; \
    STUDIO_REV='null'; \
    if [ -d /opt/pi-studio/.git ]; then STUDIO_REV="\"$(rev /opt/pi-studio)\""; fi; \
    # The vendored skill snapshot's fingerprint is MEASURED here, not passed
    # in as a build-arg, per the ground-truth rule above: SKILLSET_SNAPSHOT_REF
    # is a CLAIM about which skillset commit the file came from, while this
    # hash is what the image actually ships. Recorded together they let any
    # reader with the skillset checked out — which on this fleet is every
    # host, since all four compose stacks mount it — verify the claim at
    # RUNTIME, without CI ever needing access to the private repo. Degrades
    # to JSON null rather than failing the build if the directory is absent;
    # the smoke assertion is what turns that into a loud failure.
    #
    # Hashes the whole DIRECTORY, not just SKILL.md: a single-file hash
    # answers "did this one file change", not "is the live copy the same
    # skill" — a live checkout that added or edited a SIBLING file (a
    # reference/ doc, a helper script) would still report "identical to
    # baked snapshot" against a file-only hash. pi-extensions already ships
    # two files for exactly this reason (SKILL.md + evaluate-extension-usage.py),
    # so this is not a hypothetical. Deterministic over `find | sort`, never
    # readdir order: relative paths + per-file sha256, folded into one hash.
    # pi-devbox-version mirrors this exact pipeline over the live directory so
    # the two sides are comparable — if you change this, change that too.
    tree_sha256() { \
      ( cd "$1" && find . -type f -print | LC_ALL=C sort | xargs -r sha256sum ) 2>/dev/null | sha256sum | cut -d' ' -f1; \
    }; \
    SKILL_SNAP='null'; \
    _snap_dir=/usr/local/share/pi-devbox/skills/mempalace; \
    if [ -d "$_snap_dir" ] && [ -n "$(find "$_snap_dir" -type f -print -quit)" ]; then \
      SKILL_SNAP="\"$(tree_sha256 "$_snap_dir")\""; \
    fi; \
    { \
      echo '{'; \
      echo "  \"release_tag\": \"${RELEASE_TAG}\","; \
      echo "  \"build_date\": \"${BUILD_DATE}\","; \
      echo "  \"source_revision\": \"${SOURCE_REVISION}\","; \
      echo "  \"pi_version\": \"${PI_V}\","; \
      # Sibling of pi_version, NOT a member of components{}: that map holds git
      # SHAs and `pi-devbox-version` renders it with .value[0:12], which would
      # silently truncate a longer version string.
      echo "  \"mempalace_version\": ${MP_CORE},"; \
      # Siblings, NOT members of components{}, for two independent reasons:
      # that map means "HEAD of a clone present in this image" and the
      # skillset is not cloned here (calling it a component would be a
      # lie a future reader would act on), and `pi-devbox-version` renders
      # every components{} value with .value[0:12] — which would truncate
      # a 64-hex sha256 into something that looks like a short commit.
      # Named `_tree_sha256`, not `_sha256`: it measures every file under the
      # vendored skill directory, not one file — see tree_sha256() above.
      echo "  \"skillset_snapshot_ref\": \"${SKILLSET_SNAPSHOT_REF}\","; \
      echo "  \"skillset_snapshot_tree_sha256\": ${SKILL_SNAP},"; \
      echo "  \"components\": {"; \
      echo "    \"pi-toolkit\": \"$(rev /opt/pi-toolkit)\","; \
      echo "    \"pi-extensions\": \"$(rev /opt/pi-extensions)\","; \
      echo "    \"pi-fork\": \"$(rev /opt/pi-fork)\","; \
      echo "    \"pi-observational-memory\": \"$(rev /opt/pi-observational-memory)\","; \
      echo "    \"pi-atelier\": \"$(rev /opt/pi-atelier)\","; \
      echo "    \"mempalace-toolkit\": \"$(rev /opt/mempalace-toolkit)\","; \
      echo "    \"pi-studio\": ${STUDIO_REV}"; \
      echo "  }"; \
      echo '}'; \
    } > /etc/pi-devbox/build-manifest.json; \
    echo "── build manifest ──"; cat /etc/pi-devbox/build-manifest.json

# WORKDIR / ENTRYPOINT / CMD inherited from base.