Hermes Agent
51746f44eb
Round-9 review found the fail-closed rule narrower than the block it guards.
The scope gate admits three shapes — a scheme URL, a schemeless /api/vN path,
and a provider CLI's `api` subcommand — but the unreadable-endpoint test asked
only for https?://. So a split endpoint token in the other two shapes was in
scope to be blocked, produced no readable endpoint, and fell through to ALLOW,
while the identical split behind a literal scheme blocked.
Four writes reaching the provider unexamined, one of them a review verdict:
p=repos/a/b/iss; q=ues; gh api -X POST ${p}${q} -f title=x
p=repos/a/b/issues/1/comm; q=ents; gh api -X POST ${p}${q} -f body=x
p=repos/a/b/pulls/1/rev; q=iews; gh api -X POST ${p}${q} -f event=APPROVED
p=/api/v1/repos/a/b/iss; q=ues; curl -X POST -d x host${p}${q}
This is the same defect class as the milestone arm one round earlier, one layer
up: there the map claimed a span its wrapper did not cover, here a control
claimed a surface it did not measure. A control is only as wide as its narrowest
arm, and widening the scope gate without widening the fail-closed rule left the
gap exactly where the gate had just been extended.
Three arms now, one per admitted shape: a scheme URL token carrying an
expansion; a schemeless token carrying both a forge fragment and an expansion,
in either order; and the endpoint argument of a provider-CLI api call, read
positionally. Limits are stated in the source rather than implied — a caller who
splits the hostname as well, and an endpoint pushed past an option whose value
contains whitespace, are both outside what this measures.
An expansion in a BODY is explicitly not unreadable. Passing a payload in a
variable is the safe practice and leaves the endpoint fully legible; blocking it
would have been a control punishing the behaviour it wants.
101/101 fixtures, up from 92. Each arm is negative-controlled separately:
removing the schemeless arm fails exactly the two schemeless fixtures, removing
the provider-CLI arm fails exactly the four CLI fixtures, and neither disturbs
any pre-existing fixture. One added fixture was rewritten after it passed for
the wrong reason — its endpoint was readable, so it blocked on the endpoint map
and never exercised the arm it was written for.
Evidence: 101/101 locally and in ci-base; shellcheck clean at warning+; a
12-command sweep of ordinary forge work — reads with split endpoints, bodies in
variables, unwrapped endpoints, an artifact PUT — blocks none of them; the
18-command sweep still blocks the same three round-six flips and nothing new.
@mosaicstack/mosaic
CLI package for the Mosaic self-hosted AI agent platform.
Usage
mosaic wizard # First-run setup wizard
mosaic gateway install # Install the gateway daemon
mosaic config show # View current configuration
mosaic config hooks list # Manage Claude hooks
Headless / CI Installation
Set MOSAIC_ASSUME_YES=1 (or ensure stdin is not a TTY) to skip all interactive prompts. The following environment variables control the install:
Gateway configuration (mosaic gateway install)
| Variable | Default | Required |
|---|---|---|
MOSAIC_STORAGE_TIER |
local |
No |
MOSAIC_GATEWAY_PORT |
14242 |
No |
MOSAIC_DATABASE_URL |
(none) | Yes if tier=team |
MOSAIC_VALKEY_URL |
(none) | Yes if tier=team |
MOSAIC_ANTHROPIC_API_KEY |
(none) | No |
MOSAIC_CORS_ORIGIN |
http://localhost:3000 |
No |
Admin user bootstrap
| Variable | Default | Required |
|---|---|---|
MOSAIC_ADMIN_NAME |
(none) | Yes (headless) |
MOSAIC_ADMIN_EMAIL |
(none) | Yes (headless) |
MOSAIC_ADMIN_PASSWORD |
(none) | Yes (headless) |
MOSAIC_ADMIN_PASSWORD must be at least 8 characters. In headless mode a missing or too-short password causes a non-zero exit.
Example: Docker / CI install
export MOSAIC_ASSUME_YES=1
export MOSAIC_ADMIN_NAME="Admin"
export MOSAIC_ADMIN_EMAIL="[email protected]"
export MOSAIC_ADMIN_PASSWORD="securepass123"
mosaic gateway install
Runtime launchers
mosaic claude # Launch Claude Code with Mosaic injection
mosaic yolo claude # …with --dangerously-skip-permissions
mosaic codex | opencode | pi
mosaic claudex (EXPERIMENTAL)
Runs GPT models inside the Claude Code harness by pointing Claude Code at a
local claude-code-proxy that
translates the Anthropic Messages API to a ChatGPT-subscription (Codex OAuth)
backend. This is not Anthropic Claude — model behavior, tool use, and output
quality may differ. Intended for evaluation, not production delivery.
mosaic claudex # launch (prompts through the proxy readiness gate)
mosaic yolo claudex # …with --dangerously-skip-permissions
mosaic claudex --print "hello" # trailing args are forwarded to Claude Code
Prerequisite: the claude-code-proxy binary must be installed and
authenticated (claude-code-proxy codex auth …). mosaic claudex runs a
preflight that verifies the binary, the OAuth state (triggering a device re-auth
if needed), and a trusted local listener before launching; it fails closed
if the proxy cannot be brought up with a verified identity.
Isolation (never touches your real Claude state). claudex always launches
against an isolated CLAUDE_CONFIG_DIR (default ~/.config/mosaic/claudex/home).
The ambient CLAUDE_CONFIG_DIR is deliberately ignored, and a guard proves the
resolved dir can never be — or live under — the real ~/.claude. A claudex
session therefore cannot mutate your normal Claude Code config.
No token leakage. claudex never reads the proxy's credential file. Claude
Code is handed only ANTHROPIC_AUTH_TOKEN=unused pointed at the loopback proxy;
the entire credential-bearing env family (ANTHROPIC_*, AWS_*, GOOGLE_CLOUD_*,
GOOGLE_APPLICATION_CREDENTIALS, *_TOKEN, *_KEY, *_SECRET, …) is stripped
from the composed environment. The Bedrock/Vertex routing switches
(CLAUDE_CODE_USE_BEDROCK, CLAUDE_CODE_USE_VERTEX, and the _SKIP_*_AUTH
pair) are force-removed regardless of value — otherwise their mere presence
would route Claude Code to the real Anthropic API via AWS/GCP and bypass the
proxy. The proxy holds the real OAuth credential.
Model tiers (override via env).
| Tier | Env var | Default |
|---|---|---|
| primary (opus/sonnet) | ANTHROPIC_MODEL |
gpt-5.6-sol |
| small/fast (haiku) | ANTHROPIC_SMALL_FAST_MODEL |
gpt-5.6-luna |
Operator-provided values win over the defaults. Additional overrides:
MOSAIC_CLAUDEX_CONFIG_DIR (isolated config dir), ANTHROPIC_BASE_URL (proxy
endpoint).
Hooks management
After running mosaic wizard, Claude hooks are installed in ~/.claude/hooks-config.json.
mosaic config hooks list # Show all hooks and enabled/disabled status
mosaic config hooks disable PostToolUse # Disable a hook (reversible)
mosaic config hooks enable PostToolUse # Re-enable a disabled hook
Set CLAUDE_HOME to override the default ~/.claude directory.