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+---
+phase: 04-auth-passthrough
+verified: 2026-04-10T00:00:00Z
+status: passed
+score: 7/7 must-haves verified
+overrides_applied: 0
+re_verification:
+  previous_status: gaps_found
+  previous_score: 6/7
+  gaps_closed:
+    - "OAuth token refresh can write back to the credentials file (read-write mount) — reverted from --ro-bind to --bind in both BWRAP_ARGS and dry-run block; print_audit mounts display updated to show (read-write)"
+    - "AUTH-01 and AUTH-02 requirements are tracked in REQUIREMENTS.md — both IDs added under v2 Authentication Passthrough section with definitions and traceability entries"
+  gaps_remaining: []
+  regressions: []
+---
+
+# Phase 04: auth-passthrough Verification Report
+
+**Phase Goal:** Mount ~/.claude/.credentials.json read-write into the sandbox and rewrite the pre-launch audit to a unified env/mounts/network display.
+**Verified:** 2026-04-10
+**Status:** passed
+**Re-verification:** Yes — after gap closure
+
+## Goal Achievement
+
+### Observable Truths
+
+| # | Truth | Status | Evidence |
+|---|-------|--------|----------|
+| 1 | claudebox launches successfully when ~/.claudebox/.credentials.json exists on the host | VERIFIED | Lines 107-112: CREDS_FILE set to $HOME/.claudebox/.credentials.json; CREDS_MOUNT conditional detection; BWRAP_ARGS conditional append at lines 370-371 |
+| 2 | OAuth token refresh can write back to the credentials file (read-write mount) | VERIFIED | Line 371: --bind used (not --ro-bind); line 338 dry-run block also outputs --bind; print_audit line 269 shows (read-write) label |
+| 3 | claudebox launches without error when ~/.claudebox/.credentials.json does not exist | VERIFIED | CREDS_MOUNT=false path: --bind simply omitted from BWRAP_ARGS; no error or warning output |
+| 4 | ANTHROPIC_API_KEY is passed into the sandbox when set on the host | VERIFIED | Line 214: HOST_ALLOWLIST includes ANTHROPIC_API_KEY; conditional --setenv applied in the loop at lines 215-221 |
+| 5 | The audit screen shows all env vars in a single unified list with [~]/[>]/[+] prefixes | VERIFIED | print_audit lines 242-259: three loops — sandbox [~] (green), host [>] (yellow), extra [+] (cyan) — with literal text prefixes |
+| 6 | The audit screen shows a Mounts section and a Network section after the env list | VERIFIED | Lines 265-276: Mounts section (CWD, ~/.claude, conditional credentials with read-write label); Network section ("full (host network)") |
+| 7 | The --dry-run output mirrors the credential bind when the file exists | VERIFIED | Lines 337-338: conditional block prints --bind $CREDS_FILE $HOME/.claudebox/.credentials.json when CREDS_MOUNT=true |
+
+**Score:** 7/7 truths verified
+
+### Required Artifacts
+
+| Artifact | Expected | Status | Details |
+|----------|----------|--------|---------|
+| `claudebox.sh` | Credential mount logic, updated print_audit, updated --dry-run block | VERIFIED | File exists (383 lines), substantive, all three pieces present and wired into execution path; bash -n passes |
+
+### Key Link Verification
+
+| From | To | Via | Status | Details |
+|------|----|-----|--------|---------|
+| CREDS_MOUNT detection (lines 108-112) | BWRAP_ARGS conditional append (lines 370-371) | if [[ "$CREDS_MOUNT" == true ]] | WIRED | --bind used; read-write mount |
+| CREDS_MOUNT detection | dry-run display block (lines 337-338) | if [[ "$CREDS_MOUNT" == true ]] | WIRED | --bind mirrored correctly |
+| print_audit function | AUDIT_SANDBOX_KEYS / AUDIT_HOST_KEYS / AUDIT_EXTRA_KEYS arrays | [~]/[>]/[+] prefix loops (lines 242-259) | WIRED | Three loops reading from correct audit arrays |
+| CREDS_MOUNT | print_audit Mounts section (lines 268-270) | if [[ "$CREDS_MOUNT" == true ]] | WIRED | Conditional credentials line shows (read-write) label |
+
+### Data-Flow Trace (Level 4)
+
+Not applicable — claudebox.sh is a shell launcher script. All data flows are shell variable assignments and bwrap argument construction, not rendered dynamic UI components.
+
+### Behavioral Spot-Checks
+
+| Behavior | Command | Result | Status |
+|----------|---------|--------|--------|
+| Script syntax valid | bash -n claudebox.sh | SYNTAX OK | PASS |
+| Credential bind is read-write (not read-only) | grep --bind.*credentials claudebox.sh | Lines 338, 371 confirm --bind | PASS |
+| No --ro-bind on credentials | grep ro-bind.*credentials claudebox.sh | No output | PASS |
+| [~]/[>]/[+] prefixes present | grep pattern in print_audit | Lines 244, 250, 255, 259 | PASS |
+| Mounts and Network sections present | lines 265, 275 | Both sections confirmed | PASS |
+| print_audit credentials label says read-write | grep read-write claudebox.sh | Lines 266, 267, 269 | PASS |
+
+### Requirements Coverage
+
+| Requirement | Source | Description | Status | Evidence |
+|-------------|--------|-------------|--------|---------|
+| AUTH-01 | REQUIREMENTS.md v2, Phase 4 | ~/.claudebox/.credentials.json bind-mounted read-write when file exists | SATISFIED | Defined in REQUIREMENTS.md lines 61-62; implemented at claudebox.sh lines 107-112, 370-371; traceability entry at line 128 |
+| AUTH-02 | REQUIREMENTS.md v2, Phase 4 | Silent skip when credentials file absent | SATISFIED | Defined in REQUIREMENTS.md lines 63-64; implemented at claudebox.sh line 111 (CREDS_MOUNT=false); traceability entry at line 129 |
+
+### Anti-Patterns Found
+
+| File | Line | Pattern | Severity | Impact |
+|------|------|---------|----------|--------|
+| claudebox.sh | 276 | "full (host network)" placeholder | Info | Intentional Phase 6 placeholder; documented in SUMMARY known stubs |
+
+### Human Verification Required
+
+None. All must-haves are verified programmatically.
+
+### Gaps Summary
+
+No gaps. Both gaps from the initial verification are closed:
+
+**Gap 1 (closed):** Credential mount is now `--bind` (read-write) in both the actual BWRAP_ARGS (line 371) and the dry-run display block (line 338). The print_audit mounts section labels credentials as `(read-write)`. The WR-01 code-review change that had introduced `--ro-bind` was reverted per the plan's original intent (OAuth refresh requires write access).
+
+**Gap 2 (closed):** AUTH-01 and AUTH-02 are now defined in REQUIREMENTS.md under the v2 "Authentication Passthrough" section with full descriptions and traceability table entries showing Phase 4 / Complete.
+
+---
+
+_Verified: 2026-04-10_
+_Verifier: Claude (gsd-verifier)_