From f2948df63992edee64d72742829eb003e96abe84 Mon Sep 17 00:00:00 2001
From: Bastien Chanot <git@bchanot.fr>
Date: Mon, 6 Jul 2026 21:48:14 +0200
Subject: [PATCH] job4: seam session-start.sh
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Env-var-only seam (§3.2), zero logic change (diff is one added
condition): the version-check `git fetch` at :215 now skips when
SESSION_START_OFFLINE is set (non-empty), leaving _remote_ver empty
(same as any other offline/fetch-failure path already handled) instead
of hitting the network.

Unlocks (BACKLOG, not built here): a HOME-injected truth-table + smoke
test for session-start.sh (J4-14), without every run paying a network
round-trip or depending on origin/main being reachable.

Verified: bash -n clean, shellcheck clean (pre-existing SC1091 info
only, unrelated). Behavioral: SESSION_START_OFFLINE=1 runs in ~15ms
(no fetch) vs ~740ms unset (fetch attempted) — identical banner output
either way (v4.0.0 == CONFIG_VERSION, no update line in both). Full
`make test` exit 0.
---
 hooks/session-start.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hooks/session-start.sh b/hooks/session-start.sh
index ba89d8d..4aa57f7 100644
--- a/hooks/session-start.sh
+++ b/hooks/session-start.sh
@@ -211,7 +211,7 @@ if [ -n "$REPO_DIR" ] && [ -f "$REPO_DIR/CLAUDE.md" ]; then
 fi
 # Version check: compare local vs remote (non-blocking)
 _remote_ver=""
-if [ -n "$REPO_DIR" ] && [ -d "$REPO_DIR/.git" ]; then
+if [ -n "$REPO_DIR" ] && [ -d "$REPO_DIR/.git" ] && [ -z "${SESSION_START_OFFLINE:-}" ]; then
   _remote_ver=$(cd "$REPO_DIR" 2>/dev/null && git fetch origin --quiet 2>/dev/null && git show origin/main:version.txt 2>/dev/null) || _remote_ver=""
 fi
 if [ -n "$_remote_ver" ] && [ "$_remote_ver" != "$CONFIG_VERSION" ]; then