printing-press-amend

What this skill does

# /printing-press-amend

Turn a dogfood session into a PR for a printed CLI in the public library.

```bash
/printing-press-amend                 # auto-detect target CLI from session
/printing-press-amend superhuman      # explicit short name
/printing-press-amend superhuman-pp-cli
/printing-press-amend "$PRESS_LIBRARY/superhuman"
```

This skill lives in this repo (the machine) and acts on a printed CLI in the public library. It is sibling to `/printing-press-publish` (adds a new CLI), `/printing-press-polish` (improves a CLI pre-publish), and `/printing-press-retro` (reflects on the machine itself). None of those cover post-publish CLI amendments driven by real-session friction.

The artifact this skill produces is semantically a "patch" (in the git/PR sense), tracked by the public library's `.printing-press-patches/` directory (one file per patch). Inline `// PATCH(...)` source comments are optional navigation aids when they make a customized site easier to grep. The slash-skill name is `amend` to disambiguate from the existing `cli-printing-press patch` binary subcommand (which AST-injects pre-defined features — different mechanism, different intent).

## Setup

Before doing anything else:

<!-- PRESS_SETUP_CONTRACT_START -->
```bash
# min-binary-version: 4.0.0

# Derive scope first — needed for local build detection
_scope_dir="$(git rev-parse --show-toplevel 2>/dev/null || echo "$PWD")"
_scope_dir="$(cd "$_scope_dir" && pwd -P)"

# Prefer local build when running from inside the printing-press repo.
_press_repo=false
if [ -x "$_scope_dir/cli-printing-press" ] && [ -d "$_scope_dir/cmd/cli-printing-press" ]; then
  _press_repo=true
  export PATH="$_scope_dir:$PATH"
  echo "Using local build: $_scope_dir/cli-printing-press"
elif ! command -v cli-printing-press >/dev/null 2>&1; then
  if [ -x "$HOME/go/bin/cli-printing-press" ]; then
    echo "cli-printing-press found at ~/go/bin/cli-printing-press but not on PATH."
    echo "Add GOPATH/bin to your PATH:  export PATH=\"\$HOME/go/bin:\$PATH\""
  else
    echo "cli-printing-press binary not found."
    echo "Install with:  go install github.com/mvanhorn/cli-printing-press/v4/cmd/cli-printing-press@latest"
  fi
  return 1 2>/dev/null || exit 1
fi

# Resolve and emit the absolute path the agent must use for every later
# `cli-printing-press` invocation. `export PATH` above only affects this one
# Bash tool call; subsequent calls open a fresh shell and resolve bare
# `cli-printing-press` against the user's default PATH, where a stale global
# can silently shadow the local build. The agent captures this marker and
# substitutes the absolute path into every later invocation.
if [ "$_press_repo" = "true" ]; then
  PRINTING_PRESS_BIN="$_scope_dir/cli-printing-press"
else
  PRINTING_PRESS_BIN="$(command -v cli-printing-press 2>/dev/null || true)"
fi
echo "PRINTING_PRESS_BIN=$PRINTING_PRESS_BIN"

PRESS_BASE="$(basename "$_scope_dir" | tr '[:upper:]' '[:lower:]' | sed -E 's/[^a-z0-9_-]/-/g; s/^-+//; s/-+$//')"
if [ -z "$PRESS_BASE" ]; then
  PRESS_BASE="workspace"
fi

PRESS_SCOPE="$PRESS_BASE-$(printf '%s' "$_scope_dir" | shasum -a 256 | cut -c1-8)"
PRESS_HOME="${PRINTING_PRESS_HOME:-$HOME/printing-press}"
PRESS_RUNSTATE="$PRESS_HOME/.runstate/$PRESS_SCOPE"
PRESS_LIBRARY="$PRESS_HOME/library"
PRESS_MANUSCRIPTS="$PRESS_HOME/manuscripts"
PRESS_CURRENT="$PRESS_RUNSTATE/current"

mkdir -p "$PRESS_RUNSTATE" "$PRESS_LIBRARY" "$PRESS_MANUSCRIPTS" "$PRESS_CURRENT"

# --- Currency-floor check (standalone, fail-open) ---
# Hard-stop on binaries below the published supported floor so amend does not
# regenerate CLIs with since-fixed bugs. Repo checkouts build from source and
# are exempt. The floor is clamped to <= latest so a bad value cannot brick
# every install. Fetched fresh each run rather than reusing the printing-press
# preflight's TTL cache: amend is low-frequency, so the bounded curl + go-list
# cost is not worth its own cache here.
if [ "$_press_repo" != "true" ] && command -v curl >/dev/null 2>&1; then
  _semver_lt() {
    awk -v a="$1" -v b="$2" 'BEGIN {
      split(a, x, "."); split(b, y, ".")
      for (i = 1; i <= 3; i++) {
        if ((x[i] + 0) < (y[i] + 0)) exit 0
        if ((x[i] + 0) > (y[i] + 0)) exit 1
      }
      exit 1
    }'
  }
  _floor_installed=$("$PRINTING_PRESS_BIN" version --json 2>/dev/null | sed -nE 's/.*"version"[[:space:]]*:[[:space:]]*"([^"]+)".*/\1/p')
  _floor_doc=$(curl -fsSL --max-time 5 \
    https://raw.githubusercontent.com/mvanhorn/cli-printing-press/main/supported-versions.txt 2>/dev/null || true)
  _floor_min=$(printf '%s\n' "$_floor_doc" | awk -F= '/^min_supported=/{print $2; exit}')
  _floor_reason=$(printf '%s\n' "$_floor_doc" | sed -nE 's/^reason=//p' | head -n 1)
  _floor_latest=""
  if command -v go >/dev/null 2>&1; then
    _floor_latest=$(go list -m -json github.com/mvanhorn/cli-printing-press/v4@latest 2>/dev/null | awk '/"Version":/{v=$2; gsub(/[",]/,"",v); sub(/^v/,"",v); print v; exit}')
  fi
  if [ -n "$_floor_min" ] && [ -n "$_floor_installed" ] && [ -n "$_floor_latest" ] &&
     _semver_lt "$_floor_installed" "$_floor_min" &&
     ! _semver_lt "$_floor_latest" "$_floor_min"; then
    echo ""
    echo "[upgrade-required] printing-press v$_floor_min is the minimum supported version (you have v$_floor_installed)"
    echo "PRESS_REQUIRED_MIN=$_floor_min"
    echo "PRESS_REQUIRED_INSTALLED=$_floor_installed"
    echo "PRESS_REQUIRED_REASON=$_floor_reason"
    echo ""
  fi
fi
```
<!-- PRESS_SETUP_CONTRACT_END -->

After running the setup contract, capture the `PRINTING_PRESS_BIN=<abs-path>` line from stdout. **Every subsequent `cli-printing-press ...` invocation in this skill must use that absolute path** (substitute the value, not the literal `$PRINTING_PRESS_BIN` token) — `export PATH` above only affects the single Bash tool call it runs in, so later calls open a fresh shell where bare `cli-printing-press` resolves against the user's default `PATH` and a stale global can shadow the local build.

After capturing the binary path, check binary version compatibility. Read the `min-binary-version` field from this skill's YAML frontmatter. Run `<PRINTING_PRESS_BIN> version --json` and parse the version from the output. Compare it to `min-binary-version` using semver rules. If the installed binary is older than the minimum, stop immediately and tell the user: "cli-printing-press binary vX.Y.Z is older than the minimum required vA.B.C. Run `go install github.com/mvanhorn/cli-printing-press/v4/cmd/cli-printing-press@latest` to update."

If the setup contract emitted an `[upgrade-required]` block, the installed binary is below the published **currency floor** (`PRESS_REQUIRED_MIN`) — older releases regenerate CLIs with since-fixed bugs (`PRESS_REQUIRED_REASON`). This is a hard gate distinct from `min-binary-version`: do not amend or regenerate on that binary. Offer a one-click upgrade via `AskUserQuestion` — **Yes — upgrade now** (run `go install github.com/mvanhorn/cli-printing-press/v4/cmd/cli-printing-press@latest`, re-capture `PRINTING_PRESS_BIN`, then continue) or **Cancel** (stop the run). There is no skip-and-continue; below the floor the only paths are upgrade or abort. If the upgrade command fails, surface it and stop.

## Phase 0 — Input Mode Detection

This skill accepts two input sources for the finding list it later patches: a Claude Code session transcript (dogfood mode, current behavior) and user-supplied asks in the slash-command prompt (direct-input mode, added in v0.2). The two modes diverge only in Phase 1; Phase 2 onward is mode-agnostic and consumes a typed finding list with identical shape regardless of source.

Decide the mode before Phase 1 runs.

### Detection rubric

Read the slash-command prompt body and the immediate invocation turn from the conversation context. Classify into one of four branches:

- **`MODE=direct`** — the prompt contains a concrete CLI name AND at least one direct-input signal:
  - Action verbs targeting the CLI: `ren