Release 1.1.2 — the default path works end to end

Fix release for 1.1.1: the minimal path end to end, engine commands that
run on Godot, Unity and Unreal, hook warnings you can see, and verdicts
that say when they could not check. Details in CHANGELOG.md; upgrade
steps in UPGRADING.md (v1.1.1 → v1.1.2).

Fixes #67
Fixes #131

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WuJn2FdynEybfL5KC697nJ

.claude/hooks/pre-compact.sh

@@ -27,9 +27,16 @@ else
 fi
 [ -n "$CCGS_ROOT" ] && cd "$CCGS_ROOT" 2>/dev/null || true
 
-# Claude Code PreCompact hook: Dump session state before context compression
-# This output appears in the conversation right before compaction, ensuring
-# critical state survives the summarization process.
+# Claude Code PreCompact hook: log the compaction, and summarise session state.
+#
+# THIS OUTPUT DOES NOT REACH CLAUDE. Claude Code writes PreCompact stdout to the
+# debug log and discards its systemMessage (hooks documentation). What survives
+# a compaction is the file on disk: SessionStart fires again with source
+# `compact`, and session-start.sh shows the CHECKPOINT then. The one effect
+# here that lands is the compaction-log line at the end; the summary stays
+# bounded for anyone reading the debug log. The notes below were written when
+# the output was believed to reach the context -- the bounds still hold, the
+# "into the context" reasoning does not.
 
 # features.session_state: off => this hook is a no-op. Default `on`; see
 # session_state_enabled() in yaml-helper.sh.
@@ -49,11 +56,11 @@ echo "Timestamp: $(date)"
 # of them was 12.7 KB (~3,200 tokens) -- injected at the one moment context is
 # scarcest, and growing with the file.
 #
-# Second, and worse: content emitted here goes INTO the context that is about to
-# be compacted, so it is summarised like everything else rather than preserved.
-# We were paying full price for a lossy copy of a file that is already on disk
-# -- while post-compact.sh, which fires after, already tells the agent to read
-# that file. Pointer + a bounded checkpoint beats a dump on both cost and
+# Second: this was written believing hook output goes INTO the context that is
+# about to be compacted. It does not (see the top of this file) -- PreCompact
+# output reaches the debug log only, so a dump bought nothing, and
+# session-start.sh, which runs after every compaction, is what restores the
+# file. Pointer + a bounded checkpoint beats a dump on both cost and
 # fidelity.
 #
 # So: emit only the region between the CHECKPOINT markers (bounded by the schema
@@ -91,8 +98,9 @@ echo ""
 echo "## Files Modified (git working tree)"
 
 # BOUNDED. These three lists must never be emitted in full, one line per
-# file, with no cap -- and this output goes INTO the context that is about to be
-# compacted. The checkpoint above was redesigned to be by-reference for exactly
+# file, with no cap. (They were bounded believing this output goes into the
+# compacting context; it reaches the debug log, where an unbounded dump still
+# costs time and log size.) The checkpoint above was redesigned to be by-reference for exactly
 # that reason (see the note at the top of this file); the lists below were left
 # unbounded, so the hook still dumped whatever the working tree happened to
 # contain at the moment context was scarcest. Measured on a tree with ~5k