fix(skill): keep the §0 bootstrap intact when Claude Code loads the skill with arguments

Claude Code rewrites a skill body that it loads with arguments: every bare
$1, $2 ... becomes the matching word of the request (0-based). Nine lines of
the agent preamble used bare positional parameters, so an agent that pasted
the §0 bootstrap (every session without a pre-seeded preamble: Agent Skill
injection off, the default, or a remote or Docker session) wrote helpers
that queried session "5" with timeout=claude and looked up "5=" instead of
CODEMAN_PASSWORD= in the .env, sending every call unauthenticated.

- $1/$2 -> ${1}/${2} in preamble.sh and the identical §0 heredoc in
  SKILL.md; same bash, and Claude Code's pattern (\$\d+(?!\w)) skips it.
- CODEMAN_PREAMBLE 1.33.4 -> 1.41.2, so a cache file written by the broken
  bootstrap (which carries the old stamp) is rewritten on the next run.
- A comment at the top of the preamble states the rule.
- New test: Claude Code 2.1.300's substitution applied to SKILL.md with
  sample arguments must leave the body, and the pasted heredoc, unchanged.
  It fails on the old file with the exact sessions/5 and timeout=claude lines.
- plugins/codeman re-synced; patch changeset.

Verified with real Claude Code 2.1.300 (the delivered heredoc is now
byte-identical to preamble.sh; before, 9 lines differed) and by running the
pasted helpers against a local recording server.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

skills/codeman/SKILL.md

@@ -70,7 +70,7 @@ later call opens with, and your first REAL call performs them anyway:
 
 ```bash
 . "${XDG_CACHE_HOME:-$HOME/.cache}/codeman-agent-$CODEMAN_SESSION_ID.sh" 2>/dev/null
-[ "${CODEMAN_PREAMBLE:-}" = 1.33.4 ] || { echo "preamble missing or stale; run the full §0 block"; exit 1; }
+[ "${CODEMAN_PREAMBLE:-}" = 1.41.2 ] || { echo "preamble missing or stale; run the full §0 block"; exit 1; }
 ```
 
 ⚠️ **Never spend a Bash call on this check alone.** §1's block opens with this same
@@ -98,8 +98,11 @@ PRE="${XDG_CACHE_HOME:-$HOME/.cache}/codeman-agent-$CODEMAN_SESSION_ID.sh"
 mkdir -p "$(dirname "$PRE")"
 # Rewrite unless the file already ends with THIS version's stamp, so a stale or a
 # half-written file self-heals here instead of costing you a round trip to rm it.
-grep -qs '^CODEMAN_PREAMBLE=1.33.4$' "$PRE" || (umask 077; cat > "$PRE" <<'PREAMBLE'
-# ---- Codeman agent preamble 1.33.4 (seeded by Codeman at session spawn; the SKILL.md §0 bootstrap rewrites it when missing or stale) ----
+grep -qs '^CODEMAN_PREAMBLE=1.41.2$' "$PRE" || (umask 077; cat > "$PRE" <<'PREAMBLE'
+# ---- Codeman agent preamble 1.41.2 (seeded by Codeman at session spawn; the SKILL.md §0 bootstrap rewrites it when missing or stale) ----
+# Positional parameters are always written with braces, ${1} and never a bare dollar-digit: Claude Code
+# replaces a bare one in a skill body with the matching word of the skill's arguments, and §0 is pasted
+# from that body (test/agent-skill.test.ts pins it).
 API="${CODEMAN_API_URL:?CODEMAN_API_URL not set; refusing to guess}"
 SELF="${CODEMAN_SESSION_ID:?CODEMAN_SESSION_ID not set}"
 # Credentials, cheapest first. Your session has usually INHERITED the server's
@@ -108,7 +111,7 @@ SELF="${CODEMAN_SESSION_ID:?CODEMAN_SESSION_ID not set}"
 # reads. The data dir is wherever the hook-secret file lives. Values may be
 # quoted or `export`-prefixed.
 ENV_FILE="${CODEMAN_HOOK_SECRET_FILE:+${CODEMAN_HOOK_SECRET_FILE%hook-secret}.env}"
-envval() { sed -n "s/^\(export \)\{0,1\}$1=//p" "$ENV_FILE" | tail -1 | sed 's/^"\(.*\)"$/\1/; s/^'\''\(.*\)'\''$/\1/'; }
+envval() { sed -n "s/^\(export \)\{0,1\}${1}=//p" "$ENV_FILE" | tail -1 | sed 's/^"\(.*\)"$/\1/; s/^'\''\(.*\)'\''$/\1/'; }
 if [ -z "${CODEMAN_PASSWORD:-}" ] && [ -n "$ENV_FILE" ] && [ -f "$ENV_FILE" ]; then
   CODEMAN_USERNAME=$(envval CODEMAN_USERNAME)
   CODEMAN_PASSWORD=$(envval CODEMAN_PASSWORD)
@@ -143,15 +146,15 @@ delete_session() {
 
 # ---- fast path: the four verbs, already written. §1 composes them. ----
 _composer_up() {   # <sid> <timeoutMs> -> "true"/"false". `shift+tab` is the one token
-  "${CURL[@]}" -G "$API/api/v1/sessions/$1/wait-output" \
+  "${CURL[@]}" -G "$API/api/v1/sessions/${1}/wait-output" \
     --data-urlencode 'match=shift+tab' --data-urlencode 'from=buffer' \
-    --data-urlencode "timeout=$2" | jq -r '.data.wait.matched // false'
+    --data-urlencode "timeout=${2}" | jq -r '.data.wait.matched // false'
 }
 _dsh_up() {        # <sid> <timeoutMs> -> "true"/"false". The DeepSeek Harness TUI's
   # composer glyph. Override with DSH_READY_MARK for a profile that draws another one.
-  "${CURL[@]}" -G "$API/api/v1/sessions/$1/wait-output" \
+  "${CURL[@]}" -G "$API/api/v1/sessions/${1}/wait-output" \
     --data-urlencode "match=${DSH_READY_MARK:-❯}" --data-urlencode 'from=buffer' \
-    --data-urlencode "timeout=$2" | jq -r '.data.wait.matched // false'
+    --data-urlencode "timeout=${2}" | jq -r '.data.wait.matched // false'
 }
 # ---- the workspace-trust dialog: READ the screen, never press Enter blind ----
 # Claude Code 2.1.252 dropped the option numbers, REVERSED them, and highlights
@@ -167,7 +170,7 @@ _trust_key() {     # <sid> -> "confirm" | "move" | "" (nothing safe to press)
   # full=1 returns the RENDERED pane; a claude pane keeps no tmux history, so that
   # is the current frame rather than every repaint since launch. tail -1 anyway,
   # because the freshest marked row is the only one still true.
-  "${CURL[@]}" -G "$API/api/v1/sessions/$1/terminal" --data-urlencode 'full=1' \
+  "${CURL[@]}" -G "$API/api/v1/sessions/${1}/terminal" --data-urlencode 'full=1' \
     | jq -r '.data.terminalBuffer // empty' \
     | sed -e "s/$(printf '\033')\[[0-9;?]*[a-zA-Z]//g" -e "s/$(printf '\033')[()][AB0]//g" \
     | tr -d ' \t' | grep -i '❯[0-9.]*\(yes,itrustthisfolder\|no,exit\)' | tail -1 \
@@ -185,7 +188,7 @@ _composer_text() { # <sid> -> the composer's text with ALL whitespace removed: "
   # the LAST `❯` line: Claude Code echoes a submitted prompt with the same glyph higher
   # up in the transcript, so only the last one says whether the text was taken.
   local t
-  t=$("${CURL[@]}" -G "$API/api/v1/sessions/$1/terminal" --data-urlencode 'full=1' \
+  t=$("${CURL[@]}" -G "$API/api/v1/sessions/${1}/terminal" --data-urlencode 'full=1' \
     | jq -r '.data.terminalBuffer // empty' \
     | sed -e "s/$(printf '\033')\[[0-9;?]*[a-zA-Z]//g" -e "s/$(printf '\033')[()][AB0]//g" \
     | tr -d '\r' | grep -a '^[[:space:]]*❯' | tail -1)
@@ -195,7 +198,7 @@ _composer_text() { # <sid> -> the composer's text with ALL whitespace removed: "
   printf '%s' "$t" | sed 's/^[[:space:]]*❯//' | tr -d '[:space:]' | sed "s/$(printf '\302\240')//g"
 }
 _accept_trust() {  # <sid> -> 0 once it has answered the dialog, 1 if it could not
-  local sid="$1" k i=1
+  local sid="${1}" k i=1
   while [ "$i" -le 6 ]; do
     k=$(_trust_key "$sid")
     [ -n "$k" ] || return 1   # no dialog on screen, or a layout this cannot read
@@ -396,7 +399,7 @@ sendwait() {
 last_text() {
   local t="" prev="${2:-}"
   for _ in $(seq 1 15); do
-    t=$("${CURL[@]}" "$API/api/v1/sessions/$1/last-response" | jq -r '.data.text // empty')
+    t=$("${CURL[@]}" "$API/api/v1/sessions/${1}/last-response" | jq -r '.data.text // empty')
     [ -n "$t" ] && [ "$t" != "$prev" ] && { printf '%s\n' "$t"; return 0; }
     sleep 1
   done
@@ -407,10 +410,10 @@ last_text() {
 # The stamp is the LAST line on purpose (a truncated write leaves it unset) and is kept
 # bare on purpose: the write condition above anchors on it with $, so an inline comment
 # here would fail that match and rewrite this file on every single bootstrap.
-CODEMAN_PREAMBLE=1.33.4
+CODEMAN_PREAMBLE=1.41.2
 PREAMBLE
 )
-. "$PRE"; [ "${CODEMAN_PREAMBLE:-}" = 1.33.4 ] || { echo "preamble at $PRE is stale or truncated: rm it and re-run this block"; exit 1; }
+. "$PRE"; [ "${CODEMAN_PREAMBLE:-}" = 1.41.2 ] || { echo "preamble at $PRE is stale or truncated: rm it and re-run this block"; exit 1; }
 ```
 
 Every later Bash call that touches the API starts with the same two loader lines from
@@ -461,7 +464,7 @@ and no per-call body to hand-build.
 
 ```bash
 . "${XDG_CACHE_HOME:-$HOME/.cache}/codeman-agent-$CODEMAN_SESSION_ID.sh" 2>/dev/null   # §0 loader
-[ "${CODEMAN_PREAMBLE:-}" = 1.33.4 ] || { echo "preamble missing or stale; run the full §0 block"; exit 1; }
+[ "${CODEMAN_PREAMBLE:-}" = 1.41.2 ] || { echo "preamble missing or stale; run the full §0 block"; exit 1; }
 N=(alpha beta)                    # INVENT one fresh case name per worker; never list cases first
                                   # (a name may carry a mode: `beta:deepseek`, see below)
 T=('reply with one line: the absolute path of your working directory'