v1.91.361.0 fix(capy): reviewer installs leave the lane's launch environment alone; gstack-upgrade counts capy-server leases (GST-395/396/401/402) (#3673)

* fix(capy): reviewer installs leave the lane's launch environment alone; gstack-upgrade counts capy-server leases (GST-395/396/401/402)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* fix(capy-install): restore the header comment prefixes; borrow the lane's launch file only when it reaches a Bun (GST-401)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* test(capy-install): gate the store-download borrow test to Linux like its siblings

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

---------

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

docs/capy-install.md

@@ -31,7 +31,8 @@ the root they checked.
 
 A dispatched reviewer (an /autoplan voice, a second opinion) reads a plan and
 reports; it runs no workflow. `--for review-voice` gives its machine a real
-trailer in seconds: clone or fast-forward, Bun at gstack's own supported
+trailer in seconds: a clone when absent (an existing checkout is used as it
+is, unless it is below the supported minimum), Bun at gstack's own supported
 minimum (the project's pins are not applied, since no repo tests run there; the
 trailer says `pins: skipped (helper runtime)`), no `./setup`, no host profiles
 and no bun shim. The doctor certifies only the read-only helpers (`PASS
@@ -52,8 +53,18 @@ the lane on the same machine may be in the middle of a workflow on it: when
 origin is ahead it prints `SELF_UPGRADE: skipped (review-voice never
 self-upgrades a shared checkout; …)`, certifies the installed revision and
 stays ok with `behind=<n> … (UPGRADE_SKIPPED); fix: <root>/bin/gstack-upgrade`.
-The bootstrapper still fast-forwards a checkout below the supported minimum.
-Every /autoplan reviewer prompt
+The bootstrapper still fast-forwards a checkout below the supported minimum,
+for a reviewer too (GST-395): below it every session's trailer on that checkout
+fails (REVISION_BELOW_MINIMUM), the lane's own next install would move it
+anyway, and the minimum rises only for install-honesty or security fixes.
+When a reviewer keeps a fuller verdict, it also leaves that install's launch
+environment alone (GST-401): it writes no launch file and announces the fuller
+install's own `GSTACK_LAUNCH_FILE` and `GSTACK_LAUNCH_PATH`, so the lane's
+`<verdict>.env` and `<verdict>.launch` are never rewritten and the reviewer
+runs the helpers on the Bun that verdict certified. A launch directory the
+reviewer needs for its own Bun lives under `<verdict>.profile/review-voice.launch`
+(mode 0700), never `<verdict>.launch`; a failing review-voice check removes
+`<verdict>.profile/`. Every /autoplan reviewer prompt
 ends with this command (`GSTACK TRAILER`); the warm run's budget, under 20 s,
 is measured by `test/capy-review-voice.test.ts`.
 
@@ -108,8 +119,9 @@ there is refused with the usual `--for <skill>` fix.
    (next section).
    `SELF_UPGRADE: none (current)` when nothing is ahead;
    `--for review-voice` prints `SELF_UPGRADE: skipped (review-voice never
-   self-upgrades a shared checkout; fix: <root>/bin/gstack-upgrade when no other
-   session uses this checkout (UPGRADE_SKIPPED))` whenever origin is ahead,
+   self-upgrades a shared checkout; fix: GSTACK_UPGRADE_FORCE=1
+   <root>/bin/gstack-upgrade when no other session uses this checkout
+   (UPGRADE_SKIPPED))` whenever origin is ahead,
    with or without a lease, and `GSTACK_UPGRADE_FORCE=1` does not change that
    ([reviewer machines](#reviewer-machines---for-review-voice));
    `GSTACK_CAPY_SELF_UPGRADE=off` (or `GSTACK_CAPY_AUTO_UPGRADE=0`) prints
@@ -174,8 +186,15 @@ session holds a workflow lease on this installation: ... (UPGRADE_BUSY))`,
 leaves the checkout where the run started and stays ok with `behind=`. Each
 `gstack-skill-start` renews the lease. On Capy the leased pid is the machine's
 long-lived `capy-server`, so the deferral ends when the lease turns 120
-minutes old, not when the process exits; `bin/gstack-upgrade` run by hand
-moves the checkout sooner. The team-mode SessionStart hook
+minutes old, not when the process exits. Every session on the machine runs
+under that same `capy-server`, so `bin/gstack-upgrade` run by hand also
+counts a `capy-server` lease under 120 minutes old (it may be a sibling's) and
+refuses with `a shared harness (capy-server, pid <p>) holds a lease <n>m old;
+… (UPGRADE_BUSY)`; `GSTACK_UPGRADE_FORCE=1` moves it sooner when no other
+session uses the checkout (GST-396). The age counts from the last renewal by
+any session, so a workflow idle for more than 120 minutes since its last
+`gstack-skill-start` can be moved by any session on the machine: Capy gives
+the shell no per-session identity to tell the leases apart. The team-mode SessionStart hook
 (`bin/gstack-session-update`) honors the same leases: it logs
 `SKIP leased pid=<p>/<age>m` to `analytics/session-update.log` and tries again at
 the next session start, without writing its hourly throttle stamp. A lease whose

docs/troubleshooting.md

@@ -1554,7 +1554,7 @@ branch), then re-run `bin/gstack-upgrade`. A reinstall that failed after the
 fast-forward is completed by the next run (`reinstall pending from <version>`).
 
 <a id="upgrade-busy"></a>
-### `gstack-upgrade: live gstack sessions hold this installation: pid <p> (<age>m), ...; nothing was changed; fix: ... (UPGRADE_BUSY)`
+### `gstack-upgrade: live gstack sessions hold this installation: pid <p> (<age>m), ...; nothing was changed; fix: ... (UPGRADE_BUSY)` / `gstack-upgrade: a shared harness (capy-server, pid <p>) holds a lease <n>m old; ... (UPGRADE_BUSY)`
 
 **Meaning.** Several agents share this checkout (Capy subagents on one
 machine, say). Each session start writes a workflow lease,
@@ -1567,20 +1567,27 @@ process has exited never blocks, and neither does a stale one: each lease
 records its process's start identity, so a pid reused after a reboot or a
 machine wake (GBRA-105's lease named pid 379, which had become dbus-daemon)
 is reclaimed instead of blocking. The upgrader's own session (the pid chain it
-runs under) never counts for `bin/gstack-upgrade` run by hand. A Capy install
+runs under) never counts for `bin/gstack-upgrade` run by hand, except under a
+shared harness: on Capy every tool call of every session runs under one
+`capy-server`, so a `capy-server` lease in the caller's chain may be a
+sibling's. `bin/gstack-upgrade` counts it until it is 120 minutes old, counted
+from the last renewal by any session on the machine (`a shared harness
+(capy-server, pid <p>) holds a lease <n>m old; …`, GST-396). A Capy install
 in install mode (`bin/gstack-capy-session`) counts it while that lease is under
 120 minutes old: an install run from inside a workflow that holds the lease
 (/ship's docs step, #3571) prints `SELF_UPGRADE: skipped (a gstack run in this
 session holds a workflow lease on this installation: pid <p> (<age>m
 <command>), so the upgrade waits until the lease is 120 minutes old; fix:
-<checkout>/bin/gstack-upgrade once the run ends (UPGRADE_BUSY))` and leaves the
+<checkout>/bin/gstack-upgrade once the lease is 120 minutes old, or
+GSTACK_UPGRADE_FORCE=1 <checkout>/bin/gstack-upgrade when no other session uses
+this checkout (UPGRADE_BUSY))` and leaves the
 checkout where the run started. Each `gstack-skill-start` renews the lease.
 
 **Fix.** Wait for those sessions to finish (`bin/gstack-lease list` shows
 every lease with its age and `alive|dead|stale`; a holder is named as
 `pid <p> (<age>m <command>)`), then re-run `bin/gstack-upgrade`. For the
-session's own run, run the printed `bin/gstack-upgrade` after the run ends.
-When you know they are idle, `GSTACK_UPGRADE_FORCE=1 bin/gstack-upgrade`
+session's own run, or a shared-harness lease, re-run once the lease is 120
+minutes old. When you know no other session uses the checkout, `GSTACK_UPGRADE_FORCE=1 bin/gstack-upgrade`
 proceeds. At a Capy session start the same refusal appears as
 `SELF_UPGRADE: skipped (live gstack sessions hold this installation: ...)`,
 the doctor adds `WARN behind — … (UPGRADE_BUSY)` and the trailer stays