PRD 0062: supervisor override for egress token blocks

When the outbound DLP catches a token, route the block through the
existing supervisor approval queue instead of returning 403 outright.
The egress proxy holds the request open until the operator answers, then
remembers an approved value for the life of the proxy so the request --
and later ones carrying it -- flow through. Fails closed on rejection,
timeout, malformed response, or when supervise is disabled.

- ScanResult.matched carries the raw matched substring (sidecar-only;
  never logged or written to the proposal). scan_outbound and the token
  detectors take a safe_tokens set and skip approved values, continuing
  past a safelisted match so a second secret in the same request is
  still caught.
- New egress-token-allow proposal tool, written directly to the queue by
  the addon (the gitleaks-allow pattern from PRD 0061). build_token_allow
  _payload renders host/method/path/detector reason + redacted context.
- Async request hook polls the queue without stalling the proxy event
  loop; EGRESS_TOKEN_ALLOW_TIMEOUT_SECONDS (default 300) bounds the wait.
- Supervisor TUI renders egress-token-allow like gitleaks-allow: report
  only, modify unavailable, approval requires a recorded reason.
- Unit tests for the matched/safe-tokens plumbing, payload builder, tool
  constant round-trip, and TUI paths; README + PRD 0062.

Closes #261.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HnvBjPZC5V7qeQpFbQdDmS

README.md

@@ -15,6 +15,7 @@
 ## Features
 
 - **Per-bottle egress allowlist** — TLS-bumped HTTP/HTTPS chokepoint with a per-manifest host allowlist; per-route path/method/header `matches` filtering; outbound DLP scanning for known tokens and secrets, inbound DLP scanning for prompt-injection attempts; DoH and arbitrary hosts blocked by default.
+- **Supervisor override for token blocks** — when the outbound DLP catches a token, the request is held and surfaced in `./cli.py supervise` instead of failing outright. The operator approves or rejects; an approved value is remembered for the life of the egress proxy so the request — and later ones carrying it — flow through. Fails closed on rejection or timeout.
 - **Tokens the agent never sees** — host secrets live in a sidecar; the agent dials `http://sidecar:9099/<path>` and the proxy strips inbound `Authorization` and injects the real token before forwarding. `printenv` in the agent shows proxy URLs only.
 - **Gitleaks-scanned push (git-gate)** — `bottle.git` remotes route through a per-bottle `git daemon` that gitleaks-scans incoming refs pre-receive and forwards clean refs upstream over SSH. The agent never holds the upstream credential.
 - **Manifest-scoped skills + secrets** — each bottle declares its skills, env, git identity, remotes, and egress routes; unknown keys die at load.
@@ -150,6 +151,8 @@ You help maintain Gitea-hosted projects.
 | `dlp.inbound_detectors` | no | `false` disables inbound scanning; list restricts to named detectors (`naive_injection_detection`). |
 | `git.fetch` | no | `true` permits smart HTTP clone/fetch (`git-upload-pack`) for this host. Push (`git-receive-pack`) remains blocked. |
 
+When an outbound request is blocked because a DLP detector matched a token, the proxy queues an `egress-token-allow` proposal for the operator's `./cli.py supervise` TUI and holds the request open until it is answered (or `EGRESS_TOKEN_ALLOW_TIMEOUT_SECONDS`, default 300s, elapses — after which it fails closed). The operator never sees the raw token, only the host, method, path, and a redacted snippet. Approving adds the value to an in-memory safelist for the life of the egress proxy. Structural blocks (CRLF injection) and not-in-allowlist host blocks stay hard `403`s.
+
 More examples in `examples/`. Full design lives under `docs/prds/`; the trust-boundary rationale is in `docs/prds/0011-per-file-md-manifest.md`.
 
 ## Trademarks

bot_bottle/cli/supervise.py

@@ -54,6 +54,7 @@ from ..supervise import (
     TOOL_ALLOW,
     TOOL_EGRESS_BLOCK,
     TOOL_GITLEAKS_ALLOW,
+    TOOL_EGRESS_TOKEN_ALLOW,
     archive_proposal,
     list_pending_proposals,
     render_diff,
@@ -65,6 +66,11 @@ from ._common import PROG
 
 _REFRESH_INTERVAL_MS = 1000
 
+# Proposal tools whose payload is a read-only report, not a file the operator
+# edits: modify is unavailable and approval requires a recorded reason for the
+# audit trail.
+_REPORT_ONLY_TOOLS: tuple[str, ...] = (TOOL_GITLEAKS_ALLOW, TOOL_EGRESS_TOKEN_ALLOW)
+
 
 @dataclass(frozen=True)
 class QueuedProposal:
@@ -141,7 +147,7 @@ def _suffix_for_tool(tool: str) -> str:
         return ".dockerfile"
     if tool in (TOOL_ALLOW, TOOL_EGRESS_BLOCK):
         return ".yaml"
-    if tool == TOOL_GITLEAKS_ALLOW:
+    if tool in (TOOL_GITLEAKS_ALLOW, TOOL_EGRESS_TOKEN_ALLOW):
         return ".txt"
     return ".txt"
 
@@ -212,8 +218,8 @@ def _approve_from_tui(
     notes: str = "",
 ) -> str:
     """Approve from curses, prompting for any tool-specific audit note."""
-    if qp.proposal.tool == TOOL_GITLEAKS_ALLOW and final_file is None:
-        notes = _prompt(stdscr, "allow reason (test fixture/false positive): ")
+    if qp.proposal.tool in _REPORT_ONLY_TOOLS and final_file is None:
+        notes = _prompt(stdscr, "allow reason (false positive / legitimately needed): ")
         if not notes:
             return "approve aborted (empty reason)"
     approve(qp, final_file=final_file, notes=notes)
@@ -411,8 +417,8 @@ def _main_loop(stdscr: "curses._CursesWindow") -> None:  # type: ignore
             except ApplyError as e:
                 status_line = f"apply failed: {e}"
         elif key == ord("m"):
-            if qp.proposal.tool == TOOL_GITLEAKS_ALLOW:
-                status_line = "modify unavailable for gitleaks-allow"
+            if qp.proposal.tool in _REPORT_ONLY_TOOLS:
+                status_line = f"modify unavailable for {qp.proposal.tool}"
                 continue
             edited = _modify(stdscr, qp)
             if edited is None:
@@ -525,7 +531,7 @@ def _detail_view(
                 pass
             return
         elif key == ord("m"):
-            if qp.proposal.tool == TOOL_GITLEAKS_ALLOW:
+            if qp.proposal.tool in _REPORT_ONLY_TOOLS:
                 return
             edited = _modify(stdscr, qp)
             if edited is not None:

bot_bottle/dlp_detectors.py

@@ -78,16 +78,27 @@ TOKEN_PATTERNS: tuple[tuple[str, re.Pattern[str]], ...] = (
 )
 
 
-def scan_token_patterns(text: str, *, location: str = "body") -> ScanResult | None:
+def scan_token_patterns(
+    text: str,
+    *,
+    location: str = "body",
+    safe_tokens: typing.AbstractSet[str] | None = None,
+) -> ScanResult | None:
     normalized = _normalize_text(text)
     for name, pattern in TOKEN_PATTERNS:
-        m = pattern.search(normalized)
-        if m is not None:
+        for m in pattern.finditer(normalized):
+            value = m.group(0)
+            # A value the supervisor has approved (PRD 0062) is no longer a
+            # block — keep scanning so a second, un-approved token in the
+            # same request is still caught.
+            if safe_tokens is not None and value in safe_tokens:
+                continue
             return ScanResult(
                 severity="block",
                 reason=f"{name} found in {location}",
                 location=location,
-                context=_snippet(text, m.start(), m.end()),
+                context=_snippet(normalized, m.start(), m.end()),
+                matched=value,
             )
     return None
 
@@ -155,6 +166,7 @@ def scan_known_secrets(
     *,
     location: str = "body",
     env: typing.Mapping[str, str] | None = None,
+    safe_tokens: typing.AbstractSet[str] | None = None,
 ) -> ScanResult | None:
     if env is None:
         return None
@@ -164,11 +176,17 @@ def scan_known_secrets(
         for variant in _encoded_variants(value):
             pos = text.find(variant)
             if pos >= 0:
+                # The supervisor approves the exact encoded variant found
+                # (PRD 0062); a different encoding of the same secret is a
+                # fresh block.
+                if safe_tokens is not None and variant in safe_tokens:
+                    continue
                 return ScanResult(
                     severity="block",
                     reason=f"provisioned secret from {key} found in {location}",
                     location=location,
                     context=_snippet(text, pos, pos + len(variant)),
+                    matched=variant,
                 )
     return None
 

bot_bottle/egress_addon.py

@@ -5,6 +5,7 @@ egress container."""
 
 from __future__ import annotations
 
+import asyncio
 import json
 import os
 import signal
@@ -17,8 +18,10 @@ from egress_addon_core import (  # type: ignore[import-not-found]  # pylint: dis
     LOG_BLOCKS,
     LOG_FULL,
     Config,
+    ScanResult,
     build_inbound_scan_text,
     build_outbound_scan_text,
+    build_token_allow_payload,
     decide,
     decide_git_fetch,
     is_git_fetch_request,
@@ -36,19 +39,48 @@ try:
 except ImportError:  # pragma: no cover - host-side path
     from bot_bottle.dlp_detectors import redact_tokens  # type: ignore[import-not-found]
 
+try:
+    import supervise as _sv  # type: ignore[import-not-found]
+except ImportError:  # pragma: no cover - host-side path
+    from bot_bottle import supervise as _sv  # type: ignore[import-not-found]
+
 
 DEFAULT_ROUTES_PATH = "/etc/egress/routes.yaml"
 
 INTROSPECT_HOST = "_egress.local"
 
+# Seconds the egress proxy holds a token-blocked request open waiting for the
+# operator's supervisor decision (PRD 0062), overridable via env.
+DEFAULT_TOKEN_ALLOW_TIMEOUT_SECONDS = 300.0
+# Filesystem poll cadence while awaiting the operator's response.
+TOKEN_ALLOW_POLL_INTERVAL_SECONDS = 0.5
+
+# Fixed operator guidance attached to every token-allow proposal.
+_TOKEN_ALLOW_JUSTIFICATION = (
+    "egress DLP blocked an outbound request carrying a detected token. "
+    "Approve only if this value is a false positive or a credential this "
+    "request legitimately needs; the value is then allowed for the life of "
+    "this bottle's egress proxy."
+)
+
 
 class EgressAddon:
     def __init__(self) -> None:
         self.routes_path = os.environ.get("EGRESS_ROUTES", DEFAULT_ROUTES_PATH)
         self.config: Config = Config(routes=())
+        # Tokens the operator has approved this session (PRD 0062). In-memory
+        # only — a restart re-prompts. Mutated only from the asyncio loop that
+        # runs the addon hooks, so no lock is needed.
+        self.safe_tokens: set[str] = set()
+        self._supervise_queue_dir = os.environ.get("SUPERVISE_QUEUE_DIR", "").strip()
+        self._supervise_slug = os.environ.get("SUPERVISE_BOTTLE_SLUG", "").strip()
+        self._token_allow_timeout = _token_allow_timeout_from_env(os.environ)
         self._reload(initial=True)
         self._install_sighup()
 
+    def _supervise_available(self) -> bool:
+        return bool(self._supervise_queue_dir and self._supervise_slug)
+
     def _reload(self, *, initial: bool = False) -> None:
         try:
             text = Path(self.routes_path).read_text(encoding="utf-8")
@@ -145,7 +177,7 @@ class EgressAddon:
             + "\n"
         )
 
-    def request(self, flow: http.HTTPFlow) -> None:
+    async def request(self, flow: http.HTTPFlow) -> None:
         request_path, _, query = flow.request.path.partition("?")
 
         if flow.request.pretty_host == INTROSPECT_HOST:
@@ -158,6 +190,9 @@ class EgressAddon:
         route = match_route(self.config.routes, flow.request.pretty_host)
         if route is not None:
             body = flow.request.get_text(strict=False) or ""
+            # Re-scan after each operator approval so a second, un-approved
+            # token in the same request is still caught (PRD 0062).
+            while True:
                 scan_text = build_outbound_scan_text(
                     flow.request.pretty_host,
                     request_path,
@@ -165,8 +200,21 @@ class EgressAddon:
                     outbound_scan_headers(route, dict(flow.request.headers)),
                     body,
                 )
-            dlp_result = scan_outbound(route, scan_text, os.environ)
-            if dlp_result is not None and dlp_result.severity == "block":
+                dlp_result = scan_outbound(
+                    route, scan_text, os.environ, safe_tokens=self.safe_tokens,
+                )
+                if dlp_result is None or dlp_result.severity != "block":
+                    break
+                # Token blocks (a match with a safelist-able value) can be
+                # routed to the operator; structural blocks (CRLF, matched="")
+                # and any block when supervise is disabled stay hard 403s.
+                if dlp_result.matched and self._supervise_available():
+                    approved = await self._supervise_token_block(
+                        flow, request_path, dlp_result,
+                    )
+                    if approved:
+                        continue  # re-scan; matched value now in safe_tokens
+                    return  # _supervise_token_block wrote the 403 response
                 ctx = self._req_ctx(flow)
                 if dlp_result.context:
                     ctx = {**ctx, "context": dlp_result.context}
@@ -221,6 +269,95 @@ class EgressAddon:
         if self.config.log >= LOG_FULL:
             self._log_request(flow)
 
+    async def _supervise_token_block(
+        self,
+        flow: http.HTTPFlow,
+        request_path: str,
+        result: ScanResult,
+    ) -> bool:
+        """Route a token DLP block to the operator's supervisor queue and wait.
+
+        Returns True if the operator approved (the matched value is added to
+        `self.safe_tokens` and the caller re-scans); False if the request must
+        be blocked (a 403 response has been written to `flow`)."""
+        host = flow.request.pretty_host
+        payload = build_token_allow_payload(
+            redact_tokens(host, env=os.environ),
+            flow.request.method,
+            redact_tokens(request_path, env=os.environ),
+            result,
+        )
+        proposal = _sv.Proposal.new(
+            bottle_slug=self._supervise_slug,
+            tool=_sv.TOOL_EGRESS_TOKEN_ALLOW,
+            proposed_file=payload,
+            justification=_TOKEN_ALLOW_JUSTIFICATION,
+            current_file_hash=_sv.sha256_hex(payload),
+        )
+        queue_dir = Path(self._supervise_queue_dir)
+        try:
+            _sv.write_proposal(queue_dir, proposal)
+        except OSError as e:
+            sys.stderr.write(
+                f"egress: could not queue token-allow proposal: {e}; "
+                "blocking request\n"
+            )
+            self._block(flow, f"egress DLP: {result.reason}", ctx=self._req_ctx(flow))
+            return False
+
+        sys.stderr.write(json.dumps({
+            "event": "egress_token_supervise",
+            "reason": f"egress DLP: {result.reason}",
+            "proposal": proposal.id,
+            **self._req_ctx(flow),
+        }) + "\n")
+
+        response = await self._await_token_response(queue_dir, proposal.id)
+        _sv.archive_proposal(queue_dir, proposal.id)
+
+        if response is not None and response.status in (
+            _sv.STATUS_APPROVED, _sv.STATUS_MODIFIED,
+        ):
+            self.safe_tokens.add(result.matched)
+            if self.config.log >= LOG_BLOCKS:
+                sys.stderr.write(json.dumps({
+                    "event": "egress_token_allowed",
+                    "reason": f"egress DLP: {result.reason}",
+                    "proposal": proposal.id,
+                    **self._req_ctx(flow),
+                }) + "\n")
+            return True
+
+        if response is None:
+            reason = (
+                f"egress DLP: {result.reason}; supervisor approval timed out "
+                f"after {self._token_allow_timeout:g}s"
+            )
+        else:
+            reason = f"egress DLP: {result.reason}; supervisor rejected the request"
+        self._block(flow, reason, ctx=self._req_ctx(flow))
+        return False
+
+    async def _await_token_response(
+        self,
+        queue_dir: Path,
+        proposal_id: str,
+    ) -> "_sv.Response | None":
+        """Poll the queue dir for the operator's response without blocking the
+        proxy event loop. Returns the Response, or None on timeout."""
+        loop = asyncio.get_running_loop()
+        deadline = loop.time() + self._token_allow_timeout
+        while True:
+            try:
+                return _sv.read_response(queue_dir, proposal_id)
+            except (OSError, ValueError, KeyError):
+                # Not written yet, or a partial/malformed write — retry until
+                # the deadline, then fail closed.
+                pass
+            if loop.time() >= deadline:
+                return None
+            await asyncio.sleep(TOKEN_ALLOW_POLL_INTERVAL_SECONDS)
+
     def response(self, flow: http.HTTPFlow) -> None:
         """DLP inbound scan on response headers and body."""
         route = match_route(self.config.routes, flow.request.pretty_host)
@@ -272,7 +409,9 @@ class EgressAddon:
         message = flow.websocket.messages[-1]  # type: ignore[union-attr]
         content = message.content.decode("utf-8", errors="replace")
         if message.from_client:
-            result = scan_outbound(route, content, os.environ)
+            result = scan_outbound(
+                route, content, os.environ, safe_tokens=self.safe_tokens,
+            )
             if result is not None and result.severity == "block":
                 sys.stderr.write(f"egress DLP: {result.reason}\n")
                 flow.kill()  # type: ignore[union-attr]
@@ -286,4 +425,23 @@ class EgressAddon:
                     sys.stderr.write(f"egress DLP warn: {result.reason}\n")
 
 
+def _token_allow_timeout_from_env(env: "os._Environ[str]") -> float:
+    """Read EGRESS_TOKEN_ALLOW_TIMEOUT_SECONDS; fall back to the default on an
+    unset or invalid value (a bad value should not wedge egress at boot)."""
+    raw = env.get("EGRESS_TOKEN_ALLOW_TIMEOUT_SECONDS", "").strip()
+    if not raw:
+        return DEFAULT_TOKEN_ALLOW_TIMEOUT_SECONDS
+    try:
+        value = float(raw)
+    except ValueError:
+        value = 0.0
+    if value <= 0:
+        sys.stderr.write(
+            "egress: invalid EGRESS_TOKEN_ALLOW_TIMEOUT_SECONDS="
+            f"{raw!r}; using default {DEFAULT_TOKEN_ALLOW_TIMEOUT_SECONDS:g}s\n"
+        )
+        return DEFAULT_TOKEN_ALLOW_TIMEOUT_SECONDS
+    return value
+
+
 addons = [EgressAddon()]

bot_bottle/egress_addon_core.py

@@ -95,6 +95,11 @@ class ScanResult:
     reason: str
     location: str = ""  # where the match was found, e.g. "body", "authorization header"
     context: str = ""   # surrounding text with the match replaced by REDACT
+    # Raw substring the detector matched. Used inside the sidecar to key the
+    # supervisor-approved "safe tokens" set (PRD 0062); never logged or written
+    # to a proposal file. Empty for structural detectors (CRLF) that carry no
+    # safelist-able value.
+    matched: str = ""
 
 
 # ---------------------------------------------------------------------------
@@ -690,6 +695,8 @@ def scan_outbound(
     route: Route,
     body: str | bytes,
     environ: typing.Mapping[str, str],
+    *,
+    safe_tokens: typing.AbstractSet[str] | None = None,
 ) -> ScanResult | None:
     # Lazy import to avoid circular deps and keep dlp_detectors optional
     # at import time (the sidecar copies it flat alongside this file).
@@ -709,24 +716,47 @@ def scan_outbound(
     text = body if isinstance(body, str) else body.decode("utf-8", errors="replace")
 
     # CRLF injection is never legitimate — runs unconditionally, not gated
-    # by outbound_detectors config.
+    # by outbound_detectors config, and never override-able by safe_tokens.
     result = scan_crlf_injection(text)
     if result is not None:
         return result
 
     if _detector_enabled(route.outbound_detectors, "token_patterns"):
-        result = scan_token_patterns(text, location="body")
+        result = scan_token_patterns(text, location="body", safe_tokens=safe_tokens)
         if result is not None:
             return result
 
     if _detector_enabled(route.outbound_detectors, "known_secrets"):
-        result = scan_known_secrets(text, location="body", env=environ)
+        result = scan_known_secrets(
+            text, location="body", env=environ, safe_tokens=safe_tokens,
+        )
         if result is not None:
             return result
 
     return None
 
 
+def build_token_allow_payload(
+    host: str,
+    method: str,
+    path: str,
+    result: ScanResult,
+) -> str:
+    """Render the human-readable supervisor proposal body for an outbound
+    token block (PRD 0062). Carries the host/method/path, the detector
+    reason, and the redacted context snippet — never the raw token value."""
+    lines = [
+        "egress blocked an outbound request carrying a detected token",
+        f"host: {host}",
+        f"method: {method}",
+        f"path: {path}",
+        f"detector: {result.reason}",
+    ]
+    if result.context:
+        lines.append(f"context: {result.context}")
+    return "\n".join(lines) + "\n"
+
+
 def scan_inbound(
     route: Route,
     body: str | bytes,
@@ -760,6 +790,7 @@ __all__ = [
     "ScanResult",
     "build_inbound_scan_text",
     "build_outbound_scan_text",
+    "build_token_allow_payload",
     "decide",
     "decide_git_fetch",
     "evaluate_matches",

bot_bottle/supervise.py

@@ -52,12 +52,16 @@ TOOL_CAPABILITY_BLOCK = "capability-block"
 TOOL_EGRESS_BLOCK = "egress-block"
 TOOL_ALLOW = "allow"
 TOOL_GITLEAKS_ALLOW = "gitleaks-allow"
+# Written directly by the egress addon (not an agent-facing MCP tool) when an
+# outbound DLP token block is routed to the operator for override (PRD 0062).
+TOOL_EGRESS_TOKEN_ALLOW = "egress-token-allow"
 TOOL_LIST_EGRESS_ROUTES = "list-egress-routes"
 TOOLS: tuple[str, ...] = (
     TOOL_ALLOW,
     TOOL_CAPABILITY_BLOCK,
     TOOL_EGRESS_BLOCK,
     TOOL_GITLEAKS_ALLOW,
+    TOOL_EGRESS_TOKEN_ALLOW,
     TOOL_LIST_EGRESS_ROUTES,
 )
 
@@ -556,6 +560,7 @@ __all__ = [
     "EGRESS_INTROSPECT_URL",
     "TOOL_CAPABILITY_BLOCK",
     "TOOL_GITLEAKS_ALLOW",
+    "TOOL_EGRESS_TOKEN_ALLOW",
     "TOOL_LIST_EGRESS_ROUTES",
     "archive_proposal",
     "audit_dir",

docs/prds/0062-egress-supervisor-token-override.md

@@ -0,0 +1,140 @@
+# PRD 0062: Supervisor override for egress token blocks
+
+- **Status:** Active
+- **Author:** claude
+- **Created:** 2026-06-24
+- **Issue:** #261
+
+## Summary
+
+When the egress proxy blocks an outbound request because a DLP detector
+matched a token/secret, route that block through the existing supervisor
+approval queue instead of returning `403` immediately. The proxy holds the
+request open until the operator approves or rejects it. On approval, the
+matched token is added to an in-memory "safe tokens" set so the request — and
+any later request carrying the same token — flows through without re-prompting.
+
+## Problem
+
+The outbound DLP detectors (`token_patterns`, `known_secrets`) are
+deliberately aggressive: any string that looks like a credential is blocked
+before it leaves the bottle. That is the right default, but it produces false
+positives — a token-shaped value that is not actually a secret, or a credential
+the agent legitimately needs to send to a declared host. Today the only
+recovery is for the operator to notice the `egress DLP` 403 in the logs and
+hand-edit the route's `dlp.outbound_detectors`, which disables the detector for
+the whole route rather than allowing the one value.
+
+The operator has no in-the-loop signal that a token block happened and no
+fine-grained way to say "this specific value is fine."
+
+## Goals / Success Criteria
+
+1. An outbound DLP **token** block (a `ScanResult` carrying a matched secret
+   value) creates a supervisor proposal instead of an immediate `403`.
+2. The egress proxy holds the blocked request open, polling for the operator's
+   response up to a bounded timeout.
+3. The proposal shows the operator the host, method, path, the detector reason,
+   and a **redacted** context snippet — never the raw token value.
+4. On `approved`/`modified`, the matched token value is added to an in-memory
+   safe-tokens set and the request proceeds normally; later requests carrying
+   the same value skip the block.
+5. On `rejected`, timeout, malformed response, or missing supervisor wiring,
+   the request fails closed with the same `403` as today.
+6. Structural blocks that carry no token value (CRLF injection) and the
+   route-not-allowlisted / git blocks are unchanged — they stay hard `403`s and
+   keep their existing agent-driven `allow` / `egress-block` MCP path.
+7. The proxy event loop is not stalled while waiting: the wait is asynchronous,
+   so other flows keep being served.
+
+## Non-goals
+
+- Persisting the safe-tokens set across egress restarts. It lives in process
+  memory only; a restart re-prompts. (The issue explicitly defers persistence.)
+- Supervising inbound (prompt-injection) blocks or WebSocket frame blocks.
+  WebSocket frames still honour the safe-tokens set for already-approved values
+  but cannot wait for approval (there is no response surface after upgrade).
+- Generalising an approved secret across encodings. The safe-tokens set matches
+  the exact value the detector found.
+- Replacing the per-route `dlp.outbound_detectors` override. That remains the
+  way to turn a detector off wholesale.
+
+## Design
+
+### Detected-value plumbing
+
+`ScanResult` gains a `matched: str = ""` field carrying the raw substring the
+detector matched. The token detectors (`scan_token_patterns`,
+`scan_known_secrets`) populate it; the structural CRLF detector leaves it
+empty. The value stays inside the egress sidecar process — it is never written
+to a log line (logs already use the redacted `context`) nor to the proposal
+file.
+
+`scan_outbound` (and the token detectors it calls) accept a `safe_tokens`
+set. A match whose value is in `safe_tokens` is skipped, so an approved token
+no longer blocks. The scanners keep searching past a safelisted match so a
+second, un-approved secret in the same request is still caught.
+
+### Supervisor proposal
+
+A new proposal tool constant `egress-token-allow` is added to
+`supervise.TOOLS`. The egress addon writes the proposal directly to
+`SUPERVISE_QUEUE_DIR` (the queue is bind-mounted into the sidecar bundle and
+shared by every daemon, exactly as git-gate's `gitleaks-allow` proposal in PRD
+0061 does). The proposal's `proposed_file` is a human-readable text payload:
+
+```
+egress blocked an outbound request carrying a detected token
+host: api.example.com
+method: POST
+path: /v1/ingest
+detector: OpenAI API key found in body
+context: ...before ******** after...
+```
+
+The justification tells the operator to approve only if the value is a false
+positive or a credential the request legitimately needs.
+
+The addon then polls `<proposal-id>.response.json` for
+`EGRESS_TOKEN_ALLOW_TIMEOUT_SECONDS` (default 300). `approved`/`modified`
+allow the request and add the value to the safe-tokens set; `rejected`,
+malformed responses, and timeout fail the request closed. The proposal +
+response are archived to `processed/` after a decision.
+
+Because the wait happens inside mitmproxy's asyncio loop, the addon's
+`request` hook is async and polls with `asyncio.sleep`, so concurrent flows
+are unaffected.
+
+### Supervisor UI
+
+`cli/supervise.py` renders `egress-token-allow` like `gitleaks-allow`: the
+text payload is shown, modify is unavailable (there is no file patch to edit),
+and approval prompts for a non-empty reason that is recorded in the response
+notes. There is no on-disk config diff, so — like `gitleaks-allow` and
+`capability-block` — it writes no egress audit-log entry.
+
+### Failure handling
+
+If `SUPERVISE_QUEUE_DIR` / `SUPERVISE_BOTTLE_SLUG` are unset (supervise
+disabled for the bottle), the addon skips the queue and returns the existing
+`403`. Any error writing the proposal or reading the response also fails
+closed.
+
+## Implementation chunks
+
+1. **Core** — `ScanResult.matched`; thread `safe_tokens` through
+   `scan_outbound` / token detectors; `build_token_allow_payload`.
+2. **Supervise + TUI** — `TOOL_EGRESS_TOKEN_ALLOW`; TUI suffix, modify guard,
+   required approval reason.
+3. **Addon glue** — async `request`, safe-tokens set, proposal write + async
+   poll, allow/block decision; pass `safe_tokens` into the WebSocket path.
+4. **Tests + docs** — core/supervise/TUI unit tests; README egress + supervisor
+   notes.
+
+## Open questions
+
+- Should `known_secrets` (provisioned `EGRESS_TOKEN_*` exfiltration) be
+  override-able at all, or only `token_patterns`? This PRD allows both —
+  approval is an explicit operator decision and the safe-tokens set matches the
+  exact found value — but a future revision could restrict `known_secrets` to
+  reject-only.

tests/unit/test_dlp_detectors.py

@@ -445,5 +445,47 @@ class TestKnownSecretsNewVariants(unittest.TestCase):
         self.assertIsNotNone(result)
 
 
+class TestMatchedAndSafeTokens(unittest.TestCase):
+    """PRD 0062: detectors carry the raw matched value, and a safelisted
+    value is skipped so the supervisor can approve a specific token."""
+
+    def test_token_pattern_sets_matched(self):
+        token = "ghp_" + "A" * 36
+        result = scan_token_patterns(f"token: {token}")
+        assert result is not None
+        self.assertEqual(token, result.matched)
+
+    def test_safe_token_is_skipped(self):
+        token = "ghp_" + "A" * 36
+        self.assertIsNone(
+            scan_token_patterns(f"token: {token}", safe_tokens={token})
+        )
+
+    def test_safe_token_does_not_mask_other_token(self):
+        safe = "ghp_" + "A" * 36
+        other = "AKIAIOSFODNN7EXAMPLE"
+        result = scan_token_patterns(
+            f"a={safe} b={other}", safe_tokens={safe},
+        )
+        assert result is not None
+        self.assertEqual(other, result.matched)
+        self.assertIn("AWS", result.reason)
+
+    def test_known_secret_sets_matched_and_safelist_skips(self):
+        secret = "supersecretvalue123"
+        env = {"EGRESS_TOKEN_FOO": secret}
+        result = scan_known_secrets(f"x={secret}", env=env)
+        assert result is not None
+        self.assertEqual(secret, result.matched)
+        self.assertIsNone(
+            scan_known_secrets(f"x={secret}", env=env, safe_tokens={secret})
+        )
+
+    def test_crlf_block_has_no_matched_value(self):
+        result = scan_crlf_injection("path%0d%0aHost: evil")
+        assert result is not None
+        self.assertEqual("", result.matched)
+
+
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_egress_addon_core.py

@@ -22,8 +22,10 @@ from bot_bottle.egress_addon_core import (
     MatchEntry,
     PathMatch,
     Route,
+    ScanResult,
     build_inbound_scan_text,
     build_outbound_scan_text,
+    build_token_allow_payload,
     decide,
     decide_git_fetch,
     evaluate_matches,
@@ -1167,5 +1169,55 @@ class TestScanInbound(unittest.TestCase):
         self.assertEqual("block", result.severity)
 
 
+class TestScanOutboundSafeTokens(unittest.TestCase):
+    """PRD 0062: scan_outbound threads the supervisor-approved safe-tokens
+    set into the token detectors."""
+
+    def test_safe_token_allows_request(self):
+        text = build_outbound_scan_text(
+            host="api.example.com", path="/v1/data", query="",
+            headers={}, body=f"key={_AWS_KEY}",
+        )
+        self.assertIsNone(
+            scan_outbound(_ROUTE, text, {}, safe_tokens={_AWS_KEY})
+        )
+
+    def test_unrelated_safe_token_still_blocks(self):
+        text = build_outbound_scan_text(
+            host="api.example.com", path="/v1/data", query="",
+            headers={}, body=f"key={_AWS_KEY}",
+        )
+        result = scan_outbound(_ROUTE, text, {}, safe_tokens={"ghp_" + "A" * 36})
+        self.assertIsNotNone(result)
+        assert result is not None
+        self.assertEqual(_AWS_KEY, result.matched)
+
+
+class TestBuildTokenAllowPayload(unittest.TestCase):
+    def test_payload_includes_context_and_no_raw_token(self):
+        result = ScanResult(
+            severity="block",
+            reason="AWS access key found in body",
+            location="body",
+            context="key=******** tail",
+            matched=_AWS_KEY,
+        )
+        payload = build_token_allow_payload(
+            "api.example.com", "POST", "/v1/ingest", result,
+        )
+        self.assertIn("host: api.example.com", payload)
+        self.assertIn("method: POST", payload)
+        self.assertIn("path: /v1/ingest", payload)
+        self.assertIn("AWS access key found in body", payload)
+        self.assertIn("key=******** tail", payload)
+        # The raw matched value must never appear in the proposal file.
+        self.assertNotIn(_AWS_KEY, payload)
+
+    def test_payload_omits_context_line_when_empty(self):
+        result = ScanResult(severity="block", reason="r", matched="x")
+        payload = build_token_allow_payload("h", "GET", "/", result)
+        self.assertNotIn("context:", payload)
+
+
 if __name__ == "__main__":
     unittest.main()

tests/unit/test_supervise.py

@@ -322,11 +322,22 @@ class TestToolConstants(unittest.TestCase):
                 TOOL_CAPABILITY_BLOCK,
                 supervise.TOOL_EGRESS_BLOCK,
                 TOOL_GITLEAKS_ALLOW,
+                supervise.TOOL_EGRESS_TOKEN_ALLOW,
                 supervise.TOOL_LIST_EGRESS_ROUTES,
             ),
             supervise.TOOLS,
         )
 
+    def test_token_allow_proposal_roundtrips(self):
+        p = Proposal.new(
+            bottle_slug="dev",
+            tool=supervise.TOOL_EGRESS_TOKEN_ALLOW,
+            proposed_file="host: api.example.com\n",
+            justification="false positive",
+            current_file_hash="h",
+        )
+        self.assertEqual(p, Proposal.from_dict(p.to_dict()))
+
     def test_component_map_has_egress_entries(self):
         self.assertEqual(
             {

tests/unit/test_supervise_cli.py

@@ -20,6 +20,7 @@ from bot_bottle.supervise import (
     STATUS_REJECTED,
     TOOL_CAPABILITY_BLOCK,
     TOOL_GITLEAKS_ALLOW,
+    TOOL_EGRESS_TOKEN_ALLOW,
     read_audit_entries,
     read_response,
     sha256_hex,
@@ -35,6 +36,7 @@ def _proposal(slug: str = "dev", tool: str = TOOL_CAPABILITY_BLOCK) -> Proposal:
         supervise.TOOL_ALLOW: "routes:\n  - host: example.com\n",
         supervise.TOOL_EGRESS_BLOCK: "routes:\n  - host: example.com\n",
         TOOL_GITLEAKS_ALLOW: "file: tests/test_fixture.py\nline: 3\n",
+        TOOL_EGRESS_TOKEN_ALLOW: "host: api.example.com\ndetector: token\n",
     }
     payload = payloads.get(tool, "")
     return Proposal.new(
@@ -196,6 +198,39 @@ class TestApproveReject(_FakeHomeMixin, unittest.TestCase):
         resp = read_response(qp.queue_dir, qp.proposal.id)
         self.assertEqual("test fixture", resp.notes)
 
+    def test_approve_token_allow_leaves_response_for_egress(self):
+        qp = self._enqueue(tool=TOOL_EGRESS_TOKEN_ALLOW)
+        supervise_cli.approve(qp, notes="false positive")
+        # The egress addon polls the queue dir for the response; the TUI must
+        # not archive it (the addon archives after reading).
+        resp = read_response(qp.queue_dir, qp.proposal.id)
+        self.assertEqual(STATUS_APPROVED, resp.status)
+        self.assertEqual("false positive", resp.notes)
+        self.assertFalse((qp.queue_dir / "processed").exists())
+
+    def test_token_allow_writes_no_audit_log(self):
+        qp = self._enqueue(tool=TOOL_EGRESS_TOKEN_ALLOW)
+        supervise_cli.approve(qp, notes="false positive")
+        self.assertEqual([], read_audit_entries("egress", "dev"))
+
+    def test_tui_token_allow_requires_reason(self):
+        qp = self._enqueue(tool=TOOL_EGRESS_TOKEN_ALLOW)
+        with patch.object(supervise_cli, "_prompt", return_value=""):
+            status = supervise_cli._approve_from_tui(None, qp)  # type: ignore[arg-type]
+        self.assertEqual("approve aborted (empty reason)", status)
+        self.assertFalse((qp.queue_dir / "processed").exists())
+
+    def test_tui_token_allow_writes_reason(self):
+        qp = self._enqueue(tool=TOOL_EGRESS_TOKEN_ALLOW)
+        with patch.object(supervise_cli, "_prompt", return_value="legit"):
+            status = supervise_cli._approve_from_tui(None, qp)  # type: ignore[arg-type]
+        self.assertIn("approved egress-token-allow", status)
+        resp = read_response(qp.queue_dir, qp.proposal.id)
+        self.assertEqual("legit", resp.notes)
+
+    def test_suffix_for_token_allow_is_txt(self):
+        self.assertEqual(".txt", supervise_cli._suffix_for_tool(TOOL_EGRESS_TOKEN_ALLOW))
+
 
 # class TestCapabilityApplyWiring(_FakeHomeMixin, unittest.TestCase):
 #     # DISABLED — capability_apply functionality is currently commented out.