diff --git a/.goreleaser.yml b/.goreleaser.yml
index a0949a7..6cf2bcb 100644
--- a/.goreleaser.yml
+++ b/.goreleaser.yml
@@ -22,8 +22,9 @@ archives:
   - formats:
       - tar.gz
     name_template: "flux_{{ .Os }}_{{ .Arch }}"
+    # The binary embeds skill/SKILL.md; `flux install` installs it.
     files:
-      - skill/SKILL.md
+      - none*
 
 checksum:
   name_template: "checksums.txt"
diff --git a/docs/specs/install-command.md b/docs/specs/install-command.md
index e9ab154..d753b7e 100644
--- a/docs/specs/install-command.md
+++ b/docs/specs/install-command.md
@@ -1,7 +1,8 @@
 # Spec: `flux install claude` / `omp` / `codex`
 
-- **Status:** implemented (step 1 of "Switching over"). Step 2 waits for the
-  `v0.5.0` release.
+- **Status:** implemented. Released in `v0.5.0` (#19); `install.sh` switched
+  over in the follow-up PR.
+- **Issue:** [Install the Flux skill with flux install claude, omp or codex](https://app.basecamp.com/5734045/buckets/45557517/todos/10394794625)
 - **Date:** 2026-10-12
 - **Base:** `eyra/flux-cli` `master` at `2aac1bb`; the latest release is `v0.4.0`
 - **Checked against:**
@@ -124,21 +125,28 @@ installed, the duplicate rules above apply, and the native omp copy wins.
 `curl … | bash` install fails. CI does not catch this: `install-check.yml`
 tests a locally built archive. So this ships in two steps.
 
-1. First PR, followed by a release (`v0.5.0`). **Done on `feat/install-command`.**
+1. First PR, followed by a release (`v0.5.0`). **Done: #19, released as
+   `v0.5.0` on 2026-10-12; the cask in `eyra/homebrew-tap` has the caveats.**
    - add the command, `skill/skill.go`, the tests and the README "Agent skill"
      subsection
    - add cask `caveats` telling users to run `flux install` with `claude`,
      `omp` and/or `codex`, and to rerun it after `brew upgrade`
    - leave `install.sh` and the archive `files` unchanged
-2. Second PR, after `v0.5.0` is released:
-   - `install.sh`: replace `install_skill` with `"$INSTALL_DIR/flux" install
-     claude`, and drop `SKILL_DIR` (`CLAUDE_CONFIG_DIR` replaces it)
-   - `.goreleaser.yml`: remove `skill/SKILL.md` from the archive `files`.
-     This must happen in the same PR as the `install.sh` change, because
-     `install.sh` currently reads the skill from the archive.
+2. Second PR, after `v0.5.0` is released. **Done.**
+   - `install.sh`: replace the copy in `install_skill` with
+     `"$INSTALL_DIR/flux" install claude`, and drop `SKILL_DIR`
+     (`CLAUDE_CONFIG_DIR` replaces it). If the skill install fails (for
+     example on a symlink), `install.sh` prints a warning and keeps the
+     installed binary.
+   - `.goreleaser.yml`: replace `skill/SKILL.md` in the archive `files` with
+     `none*`, so archives hold only the binary (without a `files` list,
+     GoReleaser would add `README.md`). This must happen in the same PR as the
+     `install.sh` change, because `install.sh` used to read the skill from the
+     archive.
    - `scripts/test-install.sh`: drop the "archive contains skill/SKILL.md"
      check, and keep the install, no-backup and backup checks, now run through
-     `flux install claude`
+     `flux install claude`. Unset `CLAUDE_CONFIG_DIR` instead of `SKILL_DIR`,
+     so a developer's environment can't leak into the sandbox.
 
 ## Out of scope
 
@@ -181,5 +189,13 @@ the binary built from this branch.
 6. **`goreleaser check` (v2.18.3) accepts the cask `caveats`.**
 7. **Not fixed here: errors are printed twice.** The whole CLI prints errors
    as `Error: <msg>` and then `<msg>` again: cobra prints the error, and
-   `Execute` in `cmd/root.go` prints it once more. Fix it separately with
-   `rootCmd.SilenceErrors = true`.
+   `Execute` in `cmd/root.go` prints it once more. This is already tracked as
+   [flux CLI prints every error twice](https://app.basecamp.com/5734045/buckets/45557517/todos/10390432942).
+8. **The published `v0.5.0` works with the new `install.sh`.** Under a
+   temporary `HOME`, the step 2 `install.sh` downloaded `v0.5.0` and installed
+   the binary and a skill identical to `skill/SKILL.md`. With a symlinked
+   `~/.claude/skills/flux`, it printed the warning, left the link target
+   empty, kept the binary and exited 0.
+9. **Related:** [flux update should also update the Flux skill](https://app.basecamp.com/5734045/buckets/45557517/todos/10385129256)
+   (Specification) can now call the same `installSkill` with the embedded
+   skill.
diff --git a/install.sh b/install.sh
index fe47051..dd16ba1 100755
--- a/install.sh
+++ b/install.sh
@@ -8,9 +8,11 @@
 # Install from source (requires Go):
 #   git clone https://github.com/eyra/flux-cli && cd flux-cli && ./install.sh
 #
+# The Claude Code skill is installed with `flux install claude`, into
+# ~/.claude/skills/flux (or $CLAUDE_CONFIG_DIR/skills/flux).
+#
 # Overrides:
 #   INSTALL_DIR   where the binary goes (default: ~/.local/bin)
-#   SKILL_DIR     where the Claude Code skill goes (default: ~/.claude/skills/flux)
 #   FLUX_ARCHIVE  install this local release archive instead of downloading one
 #                 (used by scripts/test-install.sh)
 #
@@ -18,33 +20,13 @@
 set -e
 
 INSTALL_DIR="${INSTALL_DIR:-$HOME/.local/bin}"
-SKILL_DIR="${SKILL_DIR:-$HOME/.claude/skills/flux}"
 REPO="eyra/flux-cli"
 
-# install_skill <dir>: copy the skill from <dir>/skill/SKILL.md, the layout of
-# both the repo and the release archive (see .goreleaser.yml). <dir>/SKILL.md is
-# accepted as a fallback for a flat archive.
+# install_skill: install the skill embedded in the binary. A failure (such as a
+# symlinked skill folder) leaves the installed binary in place.
 install_skill() {
-  SRC=""
-  for f in "$1/skill/SKILL.md" "$1/SKILL.md"; do
-    if [ -f "$f" ]; then
-      SRC="$f"
-      break
-    fi
-  done
-  if [ -z "$SRC" ]; then
-    echo "Warning: no SKILL.md found in $1; skipping the Claude Code skill"
-    return
-  fi
-  echo "Installing Claude Code skill to $SKILL_DIR..."
-  mkdir -p "$SKILL_DIR"
-  # Keep a locally edited skill instead of silently overwriting it.
-  if [ -f "$SKILL_DIR/SKILL.md" ] && ! cmp -s "$SRC" "$SKILL_DIR/SKILL.md"; then
-    BACKUP="$SKILL_DIR/SKILL.md.bak-$(date +%Y%m%d-%H%M%S)"
-    cp "$SKILL_DIR/SKILL.md" "$BACKUP"
-    echo "Your existing SKILL.md differs from this release; backed it up to $BACKUP"
-  fi
-  cp "$SRC" "$SKILL_DIR/SKILL.md"
+  "$INSTALL_DIR/flux" install claude ||
+    echo "Warning: the Claude Code skill was not installed; see the error above"
 }
 
 check_path() {
@@ -76,7 +58,7 @@ install_from_release() {
   mv "$TMP/flux" "$INSTALL_DIR/flux"
   chmod +x "$INSTALL_DIR/flux"
 
-  install_skill "$TMP"
+  install_skill
 
   rm -rf "$TMP"
   echo "Installed $LATEST to $INSTALL_DIR/flux"
@@ -118,7 +100,7 @@ install_from_source() {
   mv flux "$INSTALL_DIR/flux"
   echo "Installed to $INSTALL_DIR/flux"
 
-  install_skill .
+  install_skill
 }
 
 # Build from source if in the repo and Go is available; otherwise download a release
diff --git a/scripts/test-install.sh b/scripts/test-install.sh
index 394becf..6f817aa 100755
--- a/scripts/test-install.sh
+++ b/scripts/test-install.sh
@@ -1,15 +1,16 @@
 #!/bin/bash
 #
 # Checks that the goreleaser archives and install.sh agree: every archive in
-# dist/ must contain the binary and skill/SKILL.md, and installing the archive
-# for this machine through install.sh must put both in place.
+# dist/ must contain the binary, and installing the archive for this machine
+# through install.sh must put the binary and, through `flux install claude`,
+# the skill in place.
 #
 # Usage: scripts/test-install.sh [dist-dir]
 #   Build the archives first: goreleaser release --snapshot --clean
 #
-# Runs with a temporary HOME, and INSTALL_DIR and SKILL_DIR unset so they
-# default into it, from a directory without go.mod, so it never touches the
-# real installation.
+# Runs with a temporary HOME, and INSTALL_DIR and CLAUDE_CONFIG_DIR unset so
+# they default into it, from a directory without go.mod, so it never touches
+# the real installation.
 
 set -euo pipefail
 
@@ -28,8 +29,7 @@ ARCHIVES=("$DIST"/flux_*.tar.gz)
 for a in "${ARCHIVES[@]}"; do
   CONTENTS="$(tar -tzf "$a")"
   grep -qx "flux" <<<"$CONTENTS" || fail "$(basename "$a") has no flux binary"
-  grep -qx "skill/SKILL.md" <<<"$CONTENTS" || fail "$(basename "$a") has no skill/SKILL.md"
-  echo "ok: $(basename "$a") contains flux and skill/SKILL.md"
+  echo "ok: $(basename "$a") contains flux"
 done
 
 OS=$(uname -s | tr '[:upper:]' '[:lower:]')
@@ -44,12 +44,12 @@ trap 'rm -rf "$SANDBOX"' EXIT
 mkdir -p "$SANDBOX/home" "$SANDBOX/work"
 
 # run_install: install $ARCHIVE through install.sh inside the sandbox. A
-# developer's exported INSTALL_DIR or SKILL_DIR must never leak in.
+# developer's exported INSTALL_DIR or CLAUDE_CONFIG_DIR must never leak in.
 run_install() {
   (
     cd "$SANDBOX/work"
     [ ! -f go.mod ] || fail "work directory has a go.mod"
-    env -u INSTALL_DIR -u SKILL_DIR HOME="$SANDBOX/home" FLUX_ARCHIVE="$ARCHIVE" \
+    env -u INSTALL_DIR -u CLAUDE_CONFIG_DIR HOME="$SANDBOX/home" FLUX_ARCHIVE="$ARCHIVE" \
       bash "$ROOT/install.sh"
   )
 }