Approved-but-not-executed plan to collapse the two-user model
(left4me + l4d2-sandbox) into one. The build-time-idmap that
translates sandbox writes back to left4me uid becomes a no-op when
source uid == target uid, so it's removed along with ~30 lines of
helper plumbing. Hardening already covers the same-uid attack
surface the sandbox uid was defending against, so collapsing makes
the architecture consistent with the web/server hardening-only
decision.
Plan: docs/superpowers/plans/2026-05-15-uid-collapse.md
Handoff: docs/superpowers/specs/2026-05-15-session-handoff.md
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The prior handoff pointed this session at running the test plan; that's
done (commit 461b8d0). Update the handoff to point the next session at
writing docs/superpowers/plans/2026-MM-DD-hardening-refactor.md against
the proven composition, including the two amendments (x86 arch,
PrivatePIDs) and the MDW permanent exclusion.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Reframe the queued uid-split decision into a broader hardening analysis.
Audit found the same-uid attack surface (DB readable from srcds, ptrace
allowed, RCON stored plaintext) is closable by either uid split or
systemd directive composition; the three specs ground that choice in a
threat model, survey the defenses, and lay out a self-contained test
plan to run on left4.me next. uid-split spec deferred pending results.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Short companion to the existing topic-specific handoff docs. Captures
the situationally-fresh state at the end of the 2026-05-15
deploy-dir-rethink + janitorial sweep so a fresh session can pick
up cold: what just landed, what's next (uid-split), what's NOT next
(build-overlay-unit, until uid-split decides), and the
decision-relevant signals that emerged during this session — mostly
that the 2-uid model was freshly load-bearing in the build-time-idmap
work and that srcds hardening already covers most of what a
gameserver-uid split would add.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
