Opsmas 2025 Day 13: mesh image router cdn-like thing & claude prompt
TOC:
mesh image router
I wrote mesh image router five years ago to be the backend of a photo sharing app. The CDN mesh could be deployed on any high storage capacity, high network throughput servers as a self-routing ad-hoc content-addressed data fetching. I refreshed it with more docs and features a bit this year.
architecture
mesh image router (mir) uses a storage and location aware self-routing hierarchy. You could even place a “real” CDN in front of mir but mir is designed to route and manage petabytes of storage on the backend itself (though it expects to have an ultimate fallback origin server for all content, so the image router tiny cdn does expire unused (or less-requested) content over time).
The mesh image router operates hierarchically where you can provision:
- more expensive fast edge nodes for the “hottest objects” (big ram + nvme + 400+ Gbps networking)
- but if content isn’t found at the “hot and fast” layer, it falls back to the next mid layer (larger multi-terabyte SSD servers, 200+ Gbps networking)
- but if content isn’t found at the next mid layer, it falls back to the bulk-before-last-resort layer (multi-petabyte HDD storage, 100+ Gbps networking)
- but if content isn’t found in the bulk-before-last-resort, it gets fetched from the cold storage (B2/S3 etc).
When images are found on a lower level when requested, they get fetched into the higher level as replicated (and LRU-managed) content for faster future serving, also since this is an image router it is aware of image sizes and can provision/scale/deduplicate images based on size classes as well (i.e. detecting user intent for the quality of an image to return and figuring out the best “available right now” capacity to serve the request even if the data isn’t existing yet; i.e. web request for a 320x240 thumbnail, but you don’t have the original image, but you do have a 1024x768 already downscaled image, so you re-downscale the 1024x768 to the new thumbnail request size instead of "pulling the original, resize original (could be 15+ MB) down to new thumbnail), etc).
basically, all serving follows a path of:
- Content Routing: Content IDs are hashed to determine the owning peer
- Local Serving: If content exists locally on the owner, serve directly
- Peer Streaming: If content is on a peer, stream via control protocol (without copying data)
- Upstream Fetch: If not cached, fetch from upstream level
- Origin Fetch: If not in any cache, fetch from S3 origin
- On-demand Resize: Generate smaller sizes from larger cached versions
One interesting feature I found when building the system is pypy allows this system to serve over 1 million updates per second while just regular cpython can’t push this architecture more than about 300k requests per second. So, I make sure to leave everything “pypy compliant” and not include any extra unnecessary features or modules which are unsupported by pypy.
┌─────────────┐
│ Client │
└──────┬──────┘
│ HTTPS
▼
┌──────────────────────────────────────────────────────────────────────────────┐
│ Level 0: Edge Cache │
│ │
│ ┌─────────────────────┐ ┌─────────────────────┐ │
│ │ Node 00 │◄────────────►│ Node 01 │ │
│ │ ┌─────────────────┐ │ Control │ ┌─────────────────┐ │ │
│ │ │ KCacheServerPub │ │ Protocol │ │ KCacheServerPub │ │ │
│ │ │ (HTTP/HTTPS) │ │ (TCP/TLS) │ │ (HTTP/HTTPS) │ │ │
│ │ └─────────────────┘ │ │ └─────────────────┘ │ │
│ │ ┌─────────────────┐ │ │ ┌─────────────────┐ │ │
│ │ │ KCacheServerPrv │ │ │ │ KCacheServerPrv │ │ │
│ │ │ (Binary TCP) │ │ │ │ (Binary TCP) │ │ │
│ │ └─────────────────┘ │ │ └─────────────────┘ │ │
│ │ ┌─────────────────┐ │ │ ┌─────────────────┐ │ │
│ │ │ LRU Cache │ │ │ │ LRU Cache │ │ │
│ │ │ (S4LRU) │ │ │ │ (S4LRU) │ │ │
│ │ └─────────────────┘ │ │ └─────────────────┘ │ │
│ └─────────────────────┘ └─────────────────────┘ │
│ │ │ │
└──────────────┼──────────────────────────────────┼────────────────────────────┘
│ │
└──────────────┬───────────────────┘
│ Control Protocol
▼
┌──────────────────────────────────────────────────────────────────────────────┐
│ Level 1: Mid-tier Cache │
│ ┌─────────────────────┐ │
│ │ Node 10 │ │
│ │ ┌─────────────────┐ │ │
│ │ │ KCacheServerPrv │ │ │
│ │ └─────────────────┘ │ │
│ └─────────────────────┘ │
└──────────────────────────────────────────────────────────────────────────────┘
│
▼
┌──────────────────────────────────────────────────────────────────────────────┐
│ Level 2: Regional Cache │
│ ┌─────────────────────┐ │
│ │ Node 20 │ │
│ └─────────────────────┘ │
└──────────────────────────────────────────────────────────────────────────────┘
│
▼
┌──────────────────────────────────────────────────────────────────────────────┐
│ Level 3: Origin │
│ ┌─────────────────────────────────────────────────────────────────────────┐ │
│ │ S3-Compatible Object Storage │ │
│ │ (Backblaze B2 / AWS S3 / etc.) │ │
│ └─────────────────────────────────────────────────────────────────────────┘ │
└──────────────────────────────────────────────────────────────────────────────┘protocol
mir implements a custom binary protocol tagged with activities of:
Private Control Protocol
Binary TCP protocol with 5-byte length prefix:
┌─────────────────────────────────────────────────────┐
│ Frame Structure │
├─────────────────────────────────────────────────────┤
│ [5 bytes: length] [1 byte: command] [N bytes: data]│
└─────────────────────────────────────────────────────┘Commands:
| Byte | Command | Payload |
|---|---|---|
# |
Heartbeat | HEARTBEAT literal |
^ |
Ping | PING literal |
* |
Pong | PONG literal (response) |
+ |
Request | File path (UTF-8) |
= |
Save | 3-byte JSON len + JSON + binary |
@ |
Record | JSON hit record |
- |
Warm | File path for pre-caching |
& |
Rebalance | Same format as Save |
Save/Rebalance Payload Structure:
┌────────────────────────────────────────────────────────────┐
│ [3 bytes: JSON length] [JSON metadata] [binary content] │
└────────────────────────────────────────────────────────────┘
JSON metadata: {"relname": "relative/path/to/file.ext"}Content Request Flow
1. Client Request
GET /puddle/{webId}/{size}/{filename.ext}
│
▼
2. Path Resolution
┌─────────────────────────────────┐
│ Check webPathCache │
│ → If cached, use cached path │
│ → If False, return 404 │
│ → If None, resolve via API │
└─────────────────────────────────┘
│
▼
3. Content ID Mapping
┌─────────────────────────────────┐
│ webID → contentId via API │
│ contentId → filesystem path │
└─────────────────────────────────┘
│
▼
4. Peer Routing
┌─────────────────────────────────┐
│ Hash contentId to peer │
│ → If self: continue │
│ → If other: stream from peer │
└─────────────────────────────────┘
│
▼
5. Local Cache Check
┌─────────────────────────────────┐
│ File exists on disk? │
│ → Yes: serve + LRU increment │
│ → No: try generation/fetch │
└─────────────────────────────────┘
│
▼
6. Image Generation
┌─────────────────────────────────┐
│ Higher-res version exists? │
│ → Yes: request resize │
│ → No: fetch from upstream │
└─────────────────────────────────┘
│
▼
7. Upstream Fetch
┌─────────────────────────────────┐
│ Level 1+ cache → Control fetch │
│ Origin level → S3 GET + resize │
└─────────────────────────────────┘
│
▼
8. Response
FileResponse with max-cache headersUpload Flow
1. POST /upload-propagate
multipart/form-data: meta (JSON) + afile (binary)
│
▼
2. Authentication
┌─────────────────────────────────┐
│ Validate upload key from meta │
│ → Invalid: 401 + 3s delay │
└─────────────────────────────────┘
│
▼
3. Local Storage
┌─────────────────────────────────┐
│ Stream to temp file │
│ Atomic rename to target path │
│ Skip if file already exists │
└─────────────────────────────────┘
│
▼
4. Upstream Propagation
┌─────────────────────────────────┐
│ Push to upstream ControlNode │
│ via = protocol command │
└─────────────────────────────────┘Multi-Process Architecture
┌─────────────────────────────────────────────────────────────┐
│ Main Process │
│ ┌─────────────────────────────────────────────────────────┐│
│ │ LRUManager ││
│ │ (multiprocessing.Manager) ││
│ └─────────────────────────────────────────────────────────┘│
│ │ │
│ ┌─────────────────┼─────────────────┐ │
│ ▼ ▼ ▼ │
│ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │
│ │ Worker 0 │ │ Worker 1 │ │ Worker N │ │
│ │ MeshConfig │ │ MeshConfig │ │ MeshConfig │ │
│ │ Public HTTP │ │ Public HTTP │ │ Public HTTP │ │
│ │ Private TCP │ │ Private TCP │ │ Private TCP │ │
│ └─────────────┘ └─────────────┘ └─────────────┘ │
└─────────────────────────────────────────────────────────────┘Startup Sequence
- Parse command line for server name
- Find server position in mesh config
- Create LRUManager (shared across workers)
- Initialize shared LRU with disk capacity
- Fork worker processes (one per CPU)
- Each worker:
- Creates MeshConfig instance
- Starts public HTTP server
- Starts private TCP server
- Connects to peer control nodes
- Runs async event loop
Unix Socket Naming
Public servers on Unix sockets use process-indexed paths:
{base_path}.{process_idx}.sockExample: /tmp/lru-00.0.sock, /tmp/lru-00.1.sock, …
mesh topology definitions
since we have a service mesh, we have to figure out how to connect everything together.
it’s just one big-ass config file:
TOML Topology Format
# config/topology.prod.toml
[meta]
name = "production"
description = "Production CDN mesh for example.com"
version = "1.0"
[s3]
host = "my-bucket.s3.us-west-000.backblazeb2.com"
[services]
content_resolution_api = "http://api.internal:9999/papi/pt"
thumbnail_endpoint = "http://thumbs.internal:6661/job.image.thumbnails.Thumbnails"
# =============================================================================
# Level 0: Edge Cache Nodes (closest to users)
# =============================================================================
# These nodes receive client requests and form a peer mesh.
# Content is distributed across peers using consistent hashing.
[[levels]]
[[levels.servers]]
name = "edge-us-east-1"
cache_dir = "/var/cache/mir/edge-us-east-1"
# Where clients are redirected for this server's content
[levels.servers.redirect_target]
host = "edge1.cdn.example.com"
port = 443
# Unix socket for local nginx proxy (high performance)
[[levels.servers.public]]
type = "unix"
path = "/run/mir/edge1.sock"
workers = "cpus" # One worker per CPU core
# Direct HTTP access (for health checks, debugging)
[[levels.servers.public]]
type = "net"
host = "0.0.0.0"
port = 8080
# Private control channel for peer communication
[[levels.servers.private]]
host = "edge1.internal.example.com"
port = 5556
[[levels.servers]]
name = "edge-us-west-1"
cache_dir = "/var/cache/mir/edge-us-west-1"
[levels.servers.redirect_target]
host = "edge2.cdn.example.com"
port = 443
[[levels.servers.public]]
type = "unix"
path = "/run/mir/edge2.sock"
workers = "cpus"
[[levels.servers.public]]
type = "net"
host = "0.0.0.0"
port = 8081
[[levels.servers.private]]
host = "edge2.internal.example.com"
port = 5557
[[levels.servers]]
name = "edge-eu-west-1"
cache_dir = "/var/cache/mir/edge-eu-west-1"
[levels.servers.redirect_target]
host = "edge3.cdn.example.com"
port = 443
[[levels.servers.public]]
type = "net"
host = "0.0.0.0"
port = 8082
[[levels.servers.private]]
host = "edge3.internal.example.com"
port = 5558
# =============================================================================
# Level 1: Regional Cache
# =============================================================================
# Aggregates cache misses from edge nodes in a region.
# No public interface - only accessed by edge nodes.
[[levels]]
[[levels.servers]]
name = "regional-us"
cache_dir = "/var/cache/mir/regional-us"
[[levels.servers.private]]
host = "regional-us.internal.example.com"
port = 6666
[[levels.servers]]
name = "regional-eu"
cache_dir = "/var/cache/mir/regional-eu"
[[levels.servers.private]]
host = "regional-eu.internal.example.com"
port = 6667
# =============================================================================
# Level 2: Origin (S3-compatible storage)
# =============================================================================
# The ultimate source of truth. Uses the S3 host defined in [s3] section.
[[levels]]
[[levels.servers]]
name = "origin"
is_s3_origin = trueSection Reference
[meta] - Topology Metadata
| Field | Type | Required | Description |
|---|---|---|---|
name |
string | Yes | Unique name for this topology |
description |
string | No | Human-readable description |
version |
string | No | Version identifier (default: “1.0”) |
[s3] - Origin Storage
| Field | Type | Required | Description |
|---|---|---|---|
host |
string | Yes | S3-compatible endpoint hostname |
Note: S3 credentials are stored in secrets, not here.
[services] - External Services
| Field | Type | Required | Description |
|---|---|---|---|
content_resolution_api |
string | No | API for web ID → content ID resolution |
thumbnail_endpoint |
string | No | Service for on-demand image resizing |
[[levels]] - Cache Hierarchy Tiers
Levels are defined as an array. Level 0 is closest to users, higher levels are closer to origin.
[[levels.servers]] - Server Definitions
| Field | Type | Required | Description |
|---|---|---|---|
name |
string | Yes | Unique server identifier |
cache_dir |
string | No | Local filesystem path for cache storage |
is_s3_origin |
boolean | No | True if this is an S3 origin server |
[levels.servers.redirect_target] - Client Redirect
| Field | Type | Required | Description |
|---|---|---|---|
host |
string | Yes | Public hostname for redirects |
port |
integer | Yes | Port (typically 443 for HTTPS) |
[[levels.servers.public]] - Public Interfaces
Unix socket interface:
| Field | Type | Required | Description |
|---|---|---|---|
type |
string | Yes | Must be "unix" |
path |
string | Yes | Socket file path |
workers |
string/int | No | "cpus" or specific count (default: "cpus") |
Network interface:
| Field | Type | Required | Description |
|---|---|---|---|
type |
string | Yes | Must be "net" |
host |
string | Yes | Bind address (e.g., "0.0.0.0") |
port |
integer | Yes | Listen port (1-65535) |
[[levels.servers.private]] - Peer Control Channel
| Field | Type | Required | Description |
|---|---|---|---|
host |
string | Yes | Internal hostname/IP |
port |
integer | Yes | Control port (1-65535) |
Topology Dataclasses
@dataclass
class ServerTarget:
name: str # Server identifier
redirect_target: RedirectTarget | None # Public redirect address
public: list[PublicResourceUnix | PublicResourceNet]
private: list[PrivateResource]
s3: str | None # S3 endpoint if origin
cache_dir: Path | None # Local cache path
is_s3_origin: bool = False
class Level:
servers: list[ServerTarget] # Servers at this level
target: dict[str, ServerTarget] # Name → server mappinghotspot avoidance
we implemnet a “Request Flow with Replication” allowing content to be replicated and detected and served from “not its primary shard” as well.
Client requests contentId="viral123" at Non-Owner Peer 2
│
▼
┌─────────────────────────────────────────────────────────────┐
│ 1. Path Resolution (webPathCache lookup) │
│ PublicWebPath → ContentId + extension │
│ Track: path_cache_hit or path_cache_miss │
└─────────────────────────────────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────────────┐
│ 2. Local Cache Check (CRITICAL - checks replicas!) │
│ if os.path.isfile(fsPath): │
│ ✓ File exists (owner OR replica) │
│ Track: lru_hit │
│ record_access(contentId) → hot tracking │
│ return FileResponse │
└─────────────────────────────────────────────────────────────┘
│ (if not cached locally)
▼
┌─────────────────────────────────────────────────────────────┐
│ 3. Determine Owner via Consistent Hash │
│ owner = hash_at_peer_level(contentId) │
│ = MD5(contentId) % num_peers │
└─────────────────────────────────────────────────────────────┘
│
├─ If owner == self:
│ │
│ ▼
│ ┌───────────────────────────────────────────────────────┐
│ │ Owner Path: Try generate → fetch upstream │
│ │ Track: lru_miss (if fetching) │
│ │ record_access(contentId) │
│ └───────────────────────────────────────────────────────┘
│
└─ If owner != self:
│
▼
┌───────────────────────────────────────────────────────┐
│ 4. Stream from Owner Peer │
│ Track: cross_peer_stream │
│ record_access(contentId) → may trigger replication│
│ return StreamResponse │
└───────────────────────────────────────────────────────┘Replication Lifecycle
Time: T0 (First Request)
├─ Non-owner Peer 2 receives request for "viral123"
├─ Not in local cache
├─ Streams from Owner (Peer 1)
└─ record_access("viral123")
└─ webPathCache["_ac_viral123"] = 1
Time: T+10s (Second Request)
├─ Another request at Peer 2
├─ Still streams from owner
└─ webPathCache["_ac_viral123"] = 2
Time: T+20s (Third Request)
├─ Another request at Peer 2
└─ webPathCache["_ac_viral123"] = 3
└─ Promoted to HotItemTracker (thread-safe)
├─ access_count = 3
├─ last_access = T+20
└─ decay_score = 3.0
Time: T+60s (Background Sync Task Runs)
├─ Calculate adaptive threshold
│ └─ If 60K req/min: threshold ≈ 297
│ └─ If 100 req/min: threshold ≈ 5
│
├─ Update decay scores for all tracked items
│ └─ "viral123": score = 3 × e^(-0.693×40/300) = 2.7
│
├─ Find items with score > threshold
│ └─ If threshold=5: "viral123" score too low
│ └─ Need more accesses or lower traffic
│
└─ For hot items: send WARM to neighbors
Time: T+5min (Score=100, viral content!)
├─ decay_score > threshold
├─ Calculate targets: ring neighbors of owner
│ └─ Owner=Peer 1, neighbors=[2,3]
│
├─ Send WARM commands
│ ├─ Peer 1 → Peer 2: WARM /vi/ra/l1/md/viral123.jpg
│ └─ Peer 1 → Peer 3: WARM /vi/ra/l1/md/viral123.jpg
│
├─ Peer 2 receives WARM
│ ├─ Fetches from Peer 1
│ ├─ Caches locally
│ └─ Sends ACK
│
└─ Mark as replicated in bloom filter
└─ Future requests at Peer 2: served from local cache!all tests pass
$ poetry run pytest
test session starts ================================================================================================
platform darwin -- Python 3.11.13[pypy-7.3.20-final], pytest-9.0.2, pluggy-1.6.0 -- /Users/matt/repos/mesh-image-router/.venv/bin/python
cachedir: .pytest_cache
hypothesis profile 'default'
rootdir: /Users/matt/repos/mesh-image-router
configfile: pytest.ini
testpaths: tests
plugins: xdist-3.8.0, hypothesis-6.148.7, cov-4.1.0, asyncio-0.21.2
asyncio: mode=Mode.AUTO
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tests/unit/test_cache.py::TestPathCacheEntry::test_create_entry PASSED [ 15%]
tests/unit/test_cache.py::TestPathCacheEntry::test_slots_defined PASSED [ 16%]
tests/unit/test_cache.py::TestPathCacheEntry::test_equality PASSED [ 16%]
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tests/unit/test_cache.py::TestLRUDictSimple::test_create_with_custom_size PASSED [ 16%]
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tests/unit/test_cache.py::TestLRUDictSimple::test_rejects_negative_elements PASSED [ 17%]
tests/unit/test_cache.py::TestLRUDictSimple::test_basic_set_get PASSED [ 17%]
tests/unit/test_cache.py::TestLRUDictSimple::test_evicts_oldest_when_full PASSED [ 17%]
tests/unit/test_cache.py::TestLRUDictSimple::test_access_promotes_to_end PASSED [ 17%]
tests/unit/test_cache.py::TestLRUDictSimple::test_update_promotes_to_end PASSED [ 18%]
tests/unit/test_cache.py::TestLRUDictSimple::test_len_correct PASSED [ 18%]
tests/unit/test_cache.py::TestLRUDictSimple::test_contains_works PASSED [ 18%]
tests/unit/test_cache.py::TestLRUDictSimple::test_iteration_order PASSED [ 18%]
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tests/unit/test_cache.py::TestCacheManager::test_create_with_string_path PASSED [ 19%]
tests/unit/test_cache.py::TestCacheManager::test_create_with_path_object PASSED [ 19%]
tests/unit/test_cache.py::TestCacheManager::test_content_id_resolution_to_full_path PASSED [ 19%]
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tests/unit/test_config_loader.py::TestConfigLoader::test_empty_levels PASSED [ 28%]
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tests/unit/test_config_loader.py::TestServerTargetBackwardsCompat::test_cache_dir_alias PASSED [ 28%]
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tests/unit/test_config_loader.py::TestMeshTopology::test_find_server_not_found PASSED [ 29%]
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tests/unit/test_constants.py::TestSizes::test_has_expected_sizes PASSED [ 31%]
tests/unit/test_constants.py::TestSizes::test_sizes_are_tuples PASSED [ 31%]
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tests/unit/test_constants.py::TestSizes::test_sizes_increase PASSED [ 32%]
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tests/unit/test_constants.py::TestRsizes::test_rsizes_has_tuples PASSED [ 33%]
tests/unit/test_constants.py::TestRsizes::test_rsizes_matches_sizes PASSED[ 33%]
tests/unit/test_constants.py::TestRsizes::test_rsizes_is_sorted PASSED [ 33%]
tests/unit/test_constants.py::TestHeaders::test_short_expires_has_cache_control PASSED [ 33%]
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tests/unit/test_constants.py::TestHeaders::test_short_expires_has_cors PASSED [ 34%]
tests/unit/test_constants.py::TestHeaders::test_max_expires_has_cache_control PASSED [ 34%]
tests/unit/test_constants.py::TestHeaders::test_max_expires_is_long PASSED[ 34%]
tests/unit/test_constants.py::TestHeaders::test_max_expires_is_immutable PASSED [ 35%]
tests/unit/test_constants.py::TestHeaders::test_max_expires_has_cors PASSED [ 35%]
tests/unit/test_constants.py::TestHeaders::test_both_have_server_header PASSED [ 35%]
tests/unit/test_constants.py::TestControlContentByteLen::test_is_positive_integer PASSED [ 35%]
tests/unit/test_constants.py::TestControlContentByteLen::test_is_reasonable_size PASSED [ 35%]
tests/unit/test_constants.py::TestControlContentByteLen::test_value_is_five PASSED [ 36%]
tests/unit/test_constants.py::TestControlContentByteLen::test_can_represent_large_messages PASSED [ 36%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_empty_cache_len PASSED [ 36%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_empty_cache_bool PASSED [ 36%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_non_empty_cache_bool PASSED [ 37%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_set_single_item PASSED [ 37%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_set_multiple_items PASSED [ 37%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_update_existing_item PASSED [ 37%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_delete_item PASSED [ 37%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_delete_nonexistent_raises PASSED [ 38%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_get_nonexistent_raises PASSED [ 38%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_contains_existing PASSED [ 38%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_contains_nonexistent PASSED [ 38%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_keys_method PASSED [ 39%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_values_method PASSED [ 39%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_items_method PASSED [ 39%]
tests/unit/test_lru_comprehensive.py::TestLRUBasicOperations::test_clear_method PASSED [ 39%]
tests/unit/test_lru_comprehensive.py::TestLRUEvictionOrder::test_evicts_oldest_first PASSED [ 39%]
tests/unit/test_lru_comprehensive.py::TestLRUEvictionOrder::test_evicts_in_insertion_order PASSED [ 40%]
tests/unit/test_lru_comprehensive.py::TestLRUEvictionOrder::test_access_prevents_eviction PASSED [ 40%]
tests/unit/test_lru_comprehensive.py::TestLRUEvictionOrder::test_update_prevents_eviction PASSED [ 40%]
tests/unit/test_lru_comprehensive.py::TestLRUEvictionOrder::test_multiple_accesses_order PASSED [ 40%]
tests/unit/test_lru_comprehensive.py::TestLRUEvictionOrder::test_eviction_order_with_repeated_access PASSED [ 41%]
tests/unit/test_lru_comprehensive.py::TestLRUCapacityBoundaries::test_capacity_one PASSED [ 41%]
tests/unit/test_lru_comprehensive.py::TestLRUCapacityBoundaries::test_capacity_two PASSED [ 41%]
tests/unit/test_lru_comprehensive.py::TestLRUCapacityBoundaries::test_exact_capacity_no_eviction PASSED [ 41%]
tests/unit/test_lru_comprehensive.py::TestLRUCapacityBoundaries::test_one_over_capacity_evicts_one PASSED [ 41%]
tests/unit/test_lru_comprehensive.py::TestLRUCapacityBoundaries::test_large_overflow PASSED [ 42%]
tests/unit/test_lru_comprehensive.py::TestLRUCapacityBoundaries::test_zero_capacity_rejected PASSED [ 42%]
tests/unit/test_lru_comprehensive.py::TestLRUCapacityBoundaries::test_negative_capacity_rejected PASSED [ 42%]
tests/unit/test_lru_comprehensive.py::TestLRUIterationOrder::test_iteration_insertion_order PASSED [ 42%]
tests/unit/test_lru_comprehensive.py::TestLRUIterationOrder::test_iteration_after_access PASSED [ 43%]
tests/unit/test_lru_comprehensive.py::TestLRUIterationOrder::test_iteration_after_update PASSED [ 43%]
tests/unit/test_lru_comprehensive.py::TestLRUIterationOrder::test_iteration_preserves_order_during_iteration PASSED [ 43%]
tests/unit/test_lru_comprehensive.py::TestLRUValueTypes::test_none_value PASSED [ 43%]
tests/unit/test_lru_comprehensive.py::TestLRUValueTypes::test_zero_value PASSED [ 43%]
tests/unit/test_lru_comprehensive.py::TestLRUValueTypes::test_empty_string_value PASSED [ 44%]
tests/unit/test_lru_comprehensive.py::TestLRUValueTypes::test_false_value PASSED [ 44%]
tests/unit/test_lru_comprehensive.py::TestLRUValueTypes::test_list_value PASSED [ 44%]
tests/unit/test_lru_comprehensive.py::TestLRUValueTypes::test_dict_value PASSED [ 44%]
tests/unit/test_lru_comprehensive.py::TestLRUValueTypes::test_complex_object_value PASSED [ 45%]
tests/unit/test_lru_comprehensive.py::TestLRUKeyTypes::test_string_keys PASSED [ 45%]
tests/unit/test_lru_comprehensive.py::TestLRUKeyTypes::test_integer_keys PASSED [ 45%]
tests/unit/test_lru_comprehensive.py::TestLRUKeyTypes::test_tuple_keys PASSED [ 45%]
tests/unit/test_lru_comprehensive.py::TestLRUKeyTypes::test_mixed_key_types PASSED [ 45%]
tests/unit/test_lru_comprehensive.py::TestLRUConcurrentPatterns::test_rapid_add_remove_same_key PASSED [ 46%]
tests/unit/test_lru_comprehensive.py::TestLRUConcurrentPatterns::test_interleaved_operations PASSED [ 46%]
tests/unit/test_lru_comprehensive.py::TestLRUHypothesis::test_never_exceeds_capacity PASSED [ 46%]
tests/unit/test_lru_comprehensive.py::TestLRUHypothesis::test_all_recent_items_accessible PASSED [ 46%]
tests/unit/test_lru_comprehensive.py::TestLRUHypothesis::test_exact_capacity_preserved PASSED [ 47%]
tests/unit/test_lru_comprehensive.py::TestLRUHypothesis::test_access_pattern_preserves_items PASSED [ 47%]
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tests/unit/test_lru_comprehensive.py::TestLRUStressPatterns::test_hot_cold_access_pattern PASSED [ 47%]
tests/unit/test_lru_comprehensive.py::TestLRUStressPatterns::test_working_set_simulation PASSED [ 48%]
tests/unit/test_lru_wrapper.py::TestLRUInit::test_creates_node_name PASSED[ 48%]
tests/unit/test_lru_wrapper.py::TestLRUInit::test_node_name_zero_indices PASSED [ 48%]
tests/unit/test_lru_wrapper.py::TestLRUInit::test_calculates_capacity_from_disk PASSED [ 48%]
tests/unit/test_lru_wrapper.py::TestLRUInit::test_respects_free_geebees_buffer PASSED [ 49%]
tests/unit/test_lru_wrapper.py::TestLRUInit::test_custom_free_geebees PASSED [ 49%]
tests/unit/test_lru_wrapper.py::TestLRUInit::test_handles_empty_cache_dir PASSED [ 49%]
tests/unit/test_lru_wrapper.py::TestLRUInit::test_handles_populated_cache_dir PASSED [ 49%]
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tests/unit/test_lru_wrapper.py::TestLRUIncrement::test_increments_s4lru PASSED [ 50%]
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tests/unit/test_lru_wrapper.py::TestLRUIncrement::test_calls_expire_when_evict_needed PASSED [ 50%]
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tests/unit/test_paths.py::TestRelativeSystemPath::test_hypothesis_valid_relative_paths PASSED [ 63%]
tests/unit/test_paths.py::TestFullPathToRelativePrefixPathAndContentId::test_extracts_last_five_components PASSED [ 63%]
tests/unit/test_paths.py::TestFullPathToRelativePrefixPathAndContentId::test_extracts_content_id_without_extension PASSED [ 63%]
tests/unit/test_paths.py::TestFullPathToRelativePrefixPathAndContentId::test_handles_various_extensions PASSED [ 64%]
tests/unit/test_paths.py::TestFullPathToRelativePrefixPathAndContentId::test_relative_path_is_correct_type PASSED [ 64%]
tests/unit/test_paths.py::TestFullPathToRelativePrefixPathAndContentId::test_content_id_is_correct_type PASSED [ 64%]
tests/unit/test_paths.py::TestFullPathToRelativePrefixPathAndContentId::test_handles_long_content_ids PASSED [ 64%]
tests/unit/test_paths.py::TestFullPathToRelativePrefixPathAndContentId::test_hypothesis_extraction PASSED [ 64%]
tests/unit/test_paths.py::TestTypeAliases::test_content_id_is_string PASSED [ 65%]
tests/unit/test_paths.py::TestTypeAliases::test_web_id_is_string PASSED [ 65%]
tests/unit/test_paths.py::TestTypeAliases::test_public_web_path_is_string PASSED [ 65%]
tests/unit/test_paths.py::TestPathSecurityEdgeCases::test_encoded_dotdot_still_detected PASSED [ 65%]
tests/unit/test_paths.py::TestPathSecurityEdgeCases::test_unicode_normalized PASSED [ 66%]
tests/unit/test_paths.py::TestPathSecurityEdgeCases::test_very_long_path PASSED [ 66%]
tests/unit/test_paths.py::TestPathSecurityEdgeCases::test_special_characters_in_filename PASSED [ 66%]
tests/unit/test_paths.py::TestPathSecurityEdgeCases::test_double_slashes_preserved PASSED [ 66%]
tests/unit/test_performance.py::TestAsyncDiskScanner::test_calculate_cache_size_empty PASSED [ 66%]
tests/unit/test_performance.py::TestAsyncDiskScanner::test_calculate_cache_size_with_files PASSED [ 67%]
tests/unit/test_performance.py::TestAsyncDiskScanner::test_non_blocking PASSED [ 67%]
tests/unit/test_performance.py::TestControlNodeConnectionPool::test_pool_initialization PASSED [ 67%]
tests/unit/test_performance.py::TestControlNodeConnectionPool::test_get_connection_least_loaded PASSED [ 67%]
tests/unit/test_performance.py::TestControlNodeConnectionPool::test_release_connection_decrements PASSED [ 68%]
tests/unit/test_performance.py::TestControlNodeConnectionPool::test_is_up_any_connection_healthy PASSED [ 68%]
tests/unit/test_performance.py::TestControlNodeConnectionPool::test_is_up_all_down PASSED [ 68%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_init PASSED [ 68%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_empty PASSED [ 68%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_with_counters PASSED [ 69%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_with_gauges PASSED [ 69%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_includes_labels PASSED [ 69%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_includes_help_text PASSED [ 69%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_includes_type PASSED [ 70%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_protocol_metrics PASSED [ 70%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_disk_metrics PASSED [ 70%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_generate_peer_metrics PASSED [ 70%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_histogram_format PASSED [ 70%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_output_ends_with_newline PASSED [ 71%]
tests/unit/test_prometheus.py::TestPrometheusExporter::test_no_empty_lines_between_metrics PASSED [ 71%]
tests/unit/test_protocol.py::TestProtocolCommand::test_heartbeat_value PASSED [ 71%]
tests/unit/test_protocol.py::TestProtocolCommand::test_ping_value PASSED [ 71%]
tests/unit/test_protocol.py::TestProtocolCommand::test_pong_value PASSED [ 72%]
tests/unit/test_protocol.py::TestProtocolCommand::test_request_value PASSED [ 72%]
tests/unit/test_protocol.py::TestProtocolCommand::test_save_value PASSED [ 72%]
tests/unit/test_protocol.py::TestProtocolCommand::test_warm_value PASSED [ 72%]
tests/unit/test_protocol.py::TestProtocolCommand::test_record_value PASSED[ 72%]
tests/unit/test_protocol.py::TestProtocolCommand::test_rebalance_value PASSED [ 73%]
tests/unit/test_protocol.py::TestProtocolCommand::test_error_value PASSED [ 73%]
tests/unit/test_protocol.py::TestProtocolCommand::test_ack_value PASSED [ 73%]
tests/unit/test_protocol.py::TestProtocolCommand::test_from_byte_valid PASSED [ 73%]
tests/unit/test_protocol.py::TestProtocolCommand::test_from_byte_invalid PASSED [ 74%]
tests/unit/test_protocol.py::TestProtocolError::test_error_codes PASSED [ 74%]
tests/unit/test_protocol.py::TestProtocolError::test_to_response_without_message PASSED [ 74%]
tests/unit/test_protocol.py::TestProtocolError::test_to_response_with_message PASSED [ 74%]
tests/unit/test_protocol.py::TestProtocolError::test_to_response_with_special_chars PASSED [ 74%]
tests/unit/test_protocol.py::TestProtocolException::test_exception_creation PASSED [ 75%]
tests/unit/test_protocol.py::TestProtocolException::test_exception_str PASSED [ 75%]
tests/unit/test_protocol.py::TestProtocolException::test_to_response PASSED [ 75%]
tests/unit/test_protocol.py::TestProtocolMessages::test_heartbeat_msg PASSED [ 75%]
tests/unit/test_protocol.py::TestProtocolMessages::test_ping_msg PASSED [ 76%]
tests/unit/test_protocol.py::TestProtocolMessages::test_pong_msg PASSED [ 76%]
tests/unit/test_protocol.py::TestProtocolMessages::test_ack_msg PASSED [ 76%]
tests/unit/test_protocol.py::TestControlProtocolInit::test_metrics_initialized PASSED [ 76%]
tests/unit/test_protocol.py::TestControlProtocolInit::test_state_initialized PASSED [ 76%]
tests/unit/test_protocol.py::TestControlProtocolCommands::test_heartbeat_no_response PASSED [ 77%]
tests/unit/test_protocol.py::TestControlProtocolCommands::test_ping_responds_pong PASSED [ 77%]
tests/unit/test_protocol.py::TestControlProtocolCommands::test_unknown_command_sends_error PASSED [ 77%]
tests/unit/test_protocol.py::TestControlProtocolCommands::test_record_command_acks PASSED [ 77%]
tests/unit/test_protocol.py::TestControlProtocolCommands::test_record_invalid_json_errors PASSED [ 78%]
tests/unit/test_protocol.py::TestControlProtocolSecurity::test_metadata_size_limit PASSED [ 78%]
tests/unit/test_protocol.py::TestControlProtocolSecurity::test_invalid_utf8_path_rejected PASSED [ 78%]
tests/unit/test_protocol.py::TestControlProtocolSecurity::test_metadata_missing_relname PASSED [ 78%]
tests/unit/test_protocol.py::TestControlProtocolSecurity::test_invalid_json_metadata PASSED [ 78%]
tests/unit/test_protocol.py::TestControlProtocolMetrics::test_metrics_increment PASSED [ 79%]
tests/unit/test_protocol.py::TestControlProtocolMetrics::test_error_metrics PASSED [ 79%]
tests/unit/test_protocol.py::TestControlProtocolMetrics::test_get_metrics_returns_instance PASSED [ 79%]
tests/unit/test_protocol.py::TestControlProtocolMetrics::test_metrics_to_dict PASSED [ 79%]
tests/unit/test_protocol.py::TestProtocolFrameFormat::test_save_metadata_format PASSED [ 80%]
tests/unit/test_protocol.py::TestProtocolFrameFormat::test_save_metadata_max_size PASSED [ 80%]
tests/unit/test_protocol.py::TestProtocolIntegration::test_request_file_not_found_flow PASSED [ 80%]
tests/unit/test_protocol.py::TestProtocolIntegration::test_warm_already_cached PASSED [ 80%]
tests/unit/test_protocol.py::TestProtocolIntegration::test_multiple_commands_sequence PASSED [ 80%]
tests/unit/test_replication.py::TestHotItemTracker::test_create PASSED [ 81%]
tests/unit/test_replication.py::TestHotItemTracker::test_increment PASSED [ 81%]
tests/unit/test_replication.py::TestHotItemTracker::test_decay_no_time_elapsed PASSED [ 81%]
tests/unit/test_replication.py::TestHotItemTracker::test_decay_half_life PASSED [ 81%]
tests/unit/test_replication.py::TestHotItemTracker::test_decay_two_half_lives PASSED [ 82%]
tests/unit/test_replication.py::TestHotItemTracker::test_decay_long_time PASSED [ 82%]
tests/unit/test_replication.py::TestHotItemTracker::test_replicated_to_bitmap PASSED [ 82%]
tests/unit/test_replication.py::TestAdaptiveThreshold::test_min_threshold_low_traffic PASSED [ 82%]
tests/unit/test_replication.py::TestAdaptiveThreshold::test_scales_with_traffic PASSED [ 82%]
tests/unit/test_replication.py::TestAdaptiveThreshold::test_high_traffic_high_threshold PASSED [ 83%]
tests/unit/test_replication.py::TestAdaptiveThreshold::test_zero_elapsed_returns_min PASSED [ 83%]
tests/unit/test_replication.py::TestAdaptiveThreshold::test_percentile_affects_threshold PASSED [ 83%]
tests/unit/test_replication.py::TestReplicationMetadata::test_create PASSED [ 83%]
tests/unit/test_replication.py::TestReplicationMetadata::test_mark_and_check_replicated PASSED [ 84%]
tests/unit/test_replication.py::TestReplicationMetadata::test_multiple_peers_same_content PASSED [ 84%]
tests/unit/test_replication.py::TestReplicationMetadata::test_different_content_independent PASSED [ 84%]
tests/unit/test_replication.py::TestReplicationMetadata::test_get_replicated_peers PASSED [ 84%]
tests/unit/test_replication.py::TestReplicationMetadata::test_clear_replicated PASSED [ 84%]
tests/unit/test_replication.py::TestReplicationMetadata::test_memory_usage PASSED [ 85%]
tests/unit/test_replication.py::TestReplicationMetadata::test_bloom_filter_no_false_negatives PASSED [ 85%]
tests/unit/test_replication.py::TestReplicationTargeting::test_replication_targets_excludes_owner PASSED [ 85%]
tests/unit/test_replication.py::TestReplicationTargeting::test_targets_are_neighbors PASSED [ 85%]
tests/unit/test_replication.py::TestReplicationTargeting::test_wraps_around_ring PASSED [ 86%]
tests/unit/test_servers.py::TestCreateRing::test_create_empty_ring PASSED [ 86%]
tests/unit/test_servers.py::TestCreateRing::test_create_single_node_ring PASSED [ 86%]
tests/unit/test_servers.py::TestCreateRing::test_create_multi_node_ring PASSED [ 86%]
tests/unit/test_servers.py::TestCreateRing::test_consistent_hashing PASSED[ 86%]
tests/unit/test_servers.py::TestCreateRing::test_different_keys_may_map_differently PASSED [ 87%]
tests/unit/test_servers.py::TestCreateRing::test_distribution_somewhat_even PASSED [ 87%]
tests/unit/test_servers.py::TestCreateRing::test_uses_md5_hash PASSED [ 87%]
tests/unit/test_servers.py::TestCreateRing::test_hypothesis_always_returns_valid_node PASSED [ 87%]
tests/unit/test_servers.py::TestCreateRing::test_hypothesis_consistent_results PASSED [ 88%]
tests/unit/test_servers.py::TestHashRingOperations::test_add_node PASSED [ 88%]
tests/unit/test_servers.py::TestHashRingOperations::test_remove_node PASSED [ 88%]
tests/unit/test_servers.py::TestHashRingOperations::test_minimal_disruption_on_add PASSED [ 88%]
tests/unit/test_servers.py::TestHashRingOperations::test_key_redistribution_on_remove PASSED [ 88%]
tests/unit/test_servers.py::TestHashRingEdgeCases::test_unicode_keys PASSED [ 89%]
tests/unit/test_servers.py::TestHashRingEdgeCases::test_empty_string_key PASSED [ 89%]
tests/unit/test_servers.py::TestHashRingEdgeCases::test_very_long_key PASSED [ 89%]
tests/unit/test_servers.py::TestHashRingEdgeCases::test_special_characters_in_key PASSED [ 89%]
tests/unit/test_servers.py::TestHashRingEdgeCases::test_binary_like_key PASSED [ 90%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_level_count_matches PASSED [ 90%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_server_count_per_level PASSED [ 90%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_server_names_preserved PASSED [ 90%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_public_resources_preserved PASSED [ 90%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_private_resources_preserved PASSED [ 91%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_redirect_target_preserved PASSED [ 91%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_cache_dir_preserved PASSED [ 91%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_s3_origin_flag PASSED [ 91%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_meta_fields_preserved PASSED [ 92%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_services_preserved PASSED [ 92%]
tests/unit/test_topology_conformance.py::TestTopologyStructureConformance::test_secrets_preserved PASSED [ 92%]
tests/unit/test_topology_conformance.py::TestTopologyLookup::test_find_server_by_name PASSED [ 92%]
tests/unit/test_topology_conformance.py::TestTopologyLookup::test_find_server_in_different_levels PASSED [ 92%]
tests/unit/test_topology_conformance.py::TestTopologyLookup::test_find_server_not_found PASSED [ 93%]
tests/unit/test_topology_conformance.py::TestTopologyLookup::test_level_indexing_by_int PASSED [ 93%]
tests/unit/test_topology_conformance.py::TestTopologyLookup::test_level_indexing_by_name PASSED [ 93%]
tests/unit/test_topology_conformance.py::TestTopologyLookup::test_level_iteration PASSED [ 93%]
tests/unit/test_topology_conformance.py::TestTopologyLookup::test_level_len PASSED [ 94%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_single_level_topology PASSED [ 94%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_many_servers_per_level PASSED [ 94%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_deep_hierarchy PASSED [ 94%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_server_with_no_public_resources PASSED [ 94%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_server_with_no_private_resources PASSED [ 95%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_multiple_public_resources_same_type PASSED [ 95%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_special_characters_in_names PASSED [ 95%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_unicode_in_description PASSED [ 95%]
tests/unit/test_topology_conformance.py::TestTopologyEdgeCases::test_port_boundary_values PASSED [ 96%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_missing_server_name PASSED [ 96%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_duplicate_server_names_in_level PASSED [ 96%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_invalid_port_zero PASSED [ 96%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_invalid_port_too_high PASSED [ 96%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_empty_host PASSED [ 97%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_empty_unix_path PASSED [ 97%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_missing_s3_host PASSED [ 97%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_no_levels PASSED [ 97%]
tests/unit/test_topology_conformance.py::TestTopologyErrors::test_empty_level PASSED [ 98%]
tests/unit/test_topology_conformance.py::TestTopologyHypothesis::test_server_name_roundtrip PASSED [ 98%]
tests/unit/test_topology_conformance.py::TestTopologyHypothesis::test_valid_port_accepted PASSED [ 98%]
tests/unit/test_topology_conformance.py::TestTopologyHypothesis::test_topology_dimensions PASSED [ 98%]
tests/unit/test_topology_conformance.py::TestBackwardsCompatibility::test_level_targets_property PASSED [ 98%]
tests/unit/test_topology_conformance.py::TestBackwardsCompatibility::test_level_target_dict_property PASSED [ 99%]
tests/unit/test_topology_conformance.py::TestBackwardsCompatibility::test_server_redirect_target_alias PASSED [ 99%]
tests/unit/test_topology_conformance.py::TestBackwardsCompatibility::test_server_cache_dir_alias PASSED [ 99%]
tests/unit/test_topology_conformance.py::TestBackwardsCompatibility::test_get_s3_args_method PASSED [ 99%]
tests/unit/test_topology_conformance.py::TestBackwardsCompatibility::test_s3_config_accesskey_alias PASSED [100%]
451 passed in 7.35s ================================================================================================stats
===============================================================================
Language Files Lines Code Comments Blanks
===============================================================================
INI 2 20 17 2 1
JSON 1 143 143 0 0
Python 52 14601 11009 805 2787
TOML 3 209 153 11 45
-------------------------------------------------------------------------------
Markdown 15 4743 0 3224 1519
|- BASH 6 176 85 58 33
|- Dockerfile 2 35 22 3 10
|- INI 1 28 22 2 4
|- JSON 1 10 10 0 0
|- Python 9 481 349 93 39
|- TOML 6 319 229 29 61
|- YAML 2 190 182 1 7
(Total) 5982 899 3410 1673
===============================================================================
Total 73 19716 11322 4042 4352
===============================================================================claude prompt
the current claude code allows you to format your own in-cli prompt with details somewhat like a normal shell prompt.
i combined all the details i could fetch and added these live-updating details to the claude bottom toolbar area:
the prompt shows you a live view of:
- current model choice (a bit of a lie, see rant about claude code’s shitty “shared global config for concurrent sessions” management below)
- unique input tokens this session (not counting duplicate sends or cache prefixes)
- output tokens (generate by the model) this sessions
- context remaining with used tokens vs available tokens
- available tokens is automatically reduced by the 77,000 token buffer remaining claude code uses as their “compaction trigger”
- lines of code added and removed this session
- total time this session has been active
- estimate API cost if you were using a cash based plan (subscription plan still shows cost, but obviously you aren’t dynamically charged per-usage)
Just add this to your ~/.claude/settings.json:
where statusline.py is this thing (not worth a repo really):
#!/usr/bin/env python3
"""
Enhanced Claude Code status line.
Layout: prompt (left-aligned) | metadata (right-aligned)
"""
import json
import os
import re
import sys
# Constants
AUTOCOMPACT_BUFFER = 77_000 # Reserved for compaction, adjust if needed
TERM_WIDTH = 140 # Assumed terminal width (can't detect live width in subprocess)
# ANSI colors
C_RESET = "\033[0m"
C_RED = "\033[31m"
C_GREEN = "\033[32m"
C_YELLOW = "\033[33m"
C_BLUE = "\033[34m"
C_MAGENTA = "\033[35m"
C_CYAN = "\033[36m"
C_DIM = "\033[2m"
def strip_ansi(text):
"""Remove ANSI escape codes to get visible length."""
return re.sub(r"\033\[[0-9;]*m", "", text)
def visible_len(text):
"""Get visible length of text (excluding ANSI codes)."""
return len(strip_ansi(text))
def fmt_k(n):
"""Format number as Xk or X.Xk"""
if n >= 1000:
return f"{n / 1000:.0f}k" if n >= 10000 else f"{n / 1000:.1f}k"
return str(n)
def fmt_duration(ms):
"""Format milliseconds as human-readable duration."""
secs = ms / 1000
if secs < 60:
return f"{secs:.0f}s"
mins = int(secs // 60)
secs = int(secs % 60)
if mins < 60:
return f"{mins}m{secs:02d}s"
hours = int(mins // 60)
mins = int(mins % 60)
return f"{hours}h{mins:02d}m"
def main():
try:
data = json.load(sys.stdin)
except json.JSONDecodeError:
print("[?] error")
return
# Debug: save last input for checking formatting offline or in testing
if False:
try:
with open(
os.path.expanduser("~/.claude/statusline-lastinput.json"), "w"
) as f:
json.dump(data, f, indent=2)
except Exception:
pass
# === Extract data ===
# Model
model = data.get("model", {}).get("display_name", "?")
# Cumulative session tokens
ctx = data.get("context_window", {})
total_in = ctx.get("total_input_tokens", 0)
total_out = ctx.get("total_output_tokens", 0)
ctx_size = ctx.get("context_window_size", 200_000)
# Usable context (excluding autocompact buffer)
usable_ctx = ctx_size - AUTOCOMPACT_BUFFER
# Current context from transcript
current_ctx = 0
transcript_path = data.get("transcript_path")
if transcript_path and os.path.exists(transcript_path):
try:
# Read only the last ~32KB of transcript (much faster for long sessions)
with open(transcript_path, "rb") as f:
f.seek(0, 2) # End of file
size = f.tell()
read_size = min(size, 32768)
f.seek(max(0, size - read_size))
tail = f.read().decode("utf-8", errors="ignore")
# Parse lines from the end
for line in reversed(tail.splitlines()):
try:
msg = json.loads(line)
usage = msg.get("message", {}).get("usage")
if usage:
current_ctx = (
usage.get("input_tokens", 0)
+ usage.get("cache_creation_input_tokens", 0)
+ usage.get("cache_read_input_tokens", 0)
)
break
except (json.JSONDecodeError, KeyError, TypeError):
continue
except Exception:
pass
# Fallback to cumulative
if current_ctx == 0:
current_ctx = total_in + total_out
approx = "~"
else:
approx = ""
# Context percentage of usable space
pct = int((current_ctx / usable_ctx) * 100) if usable_ctx > 0 else 0
# Color for context percentage
if pct < 50:
pct_color = C_GREEN
elif pct < 80:
pct_color = C_YELLOW
else:
pct_color = C_RED
# Cost and stats
cost_data = data.get("cost", {})
cost = cost_data.get("total_cost_usd", 0)
lines_added = cost_data.get("total_lines_added", 0)
lines_removed = cost_data.get("total_lines_removed", 0)
api_duration_ms = cost_data.get("total_api_duration_ms", 0)
# Prompt: user@host:path
user = os.environ.get("USER", "?")
host = os.uname().nodename.split(".")[0]
cwd = os.getcwd()
home = os.path.expanduser("~")
if cwd.startswith(home):
cwd = "~" + cwd[len(home) :]
# === Build output ===
# Left side: prompt
left = f"{C_RED}{user}{C_RESET}@{C_MAGENTA}{host}{C_RESET}:{C_BLUE}{cwd}{C_RESET}"
# Right side: metadata
# Format lines changed: +added-removed
lines_str = f"{C_GREEN}+{lines_added:,}{C_RESET};{C_RED}-{lines_removed:,}{C_RESET}"
right_parts = [
f"{C_CYAN}{model}{C_RESET}",
f"in:{C_YELLOW}{fmt_k(total_in)}{C_RESET} out:{C_YELLOW}{fmt_k(total_out)}{C_RESET}",
f"ctx:{pct_color}{approx}{pct}%{C_RESET} {C_DIM}({fmt_k(current_ctx)}/{fmt_k(usable_ctx)}){C_RESET}",
lines_str,
f"{C_DIM}{fmt_duration(api_duration_ms)}{C_RESET} {C_MAGENTA}${cost:,.2f}{C_RESET}",
]
right = " | ".join(right_parts)
# Calculate padding to right-align metadata
left_len = visible_len(left)
right_len = visible_len(right)
padding = TERM_WIDTH - left_len - right_len
# Ensure at least 2 spaces between left and right
if padding < 2:
padding = 2
output = f"{left}{' ' * padding}{right}"
print(output, end="")
if __name__ == "__main__":
main()note though: the prompt can’t be 100% accurate because, as we covered previously, anthropic is oddly incompetent when it comes to system and utility and infrastructure design. For example, here, you can run multiple claude commands, but they all appear to share the same global ~/.claude/settings.json which gets updated live as you run things, so if you have two terminals running claude with different /model settings, the last one to change /model overwrites your global “model” setting in the config file? wtf? (this is also why you can see things like “you have used -700k tokens!” in the UI when it gets confused about your current model, or when it aggressively compacts your 1 million model session at 150k tokens when it gets confused due to using one global state for indepedent concurrent processes always conflicting.) we see all over the claude code ecosystem they combine (and confuse) config files with metrics files where they dump live self-rewriting metrics into your static config files which is just… utter bullshit if you’ve ever designed systems before? you don’t add dynamically updating/changing/automated-writing stats into static user config profiles? wtf are they even doing over there? must be some meta-ethics brain where you just make everything self-rewriting json so all state is always outdated and corrupt and nobody can save or restore their own config files without breaking things because all files “Self-rewrite real time stats” inside of them. again, we say: wtf?