fix: harden the HTTP server, settings and file inputs by heide-oficial · Pull Request #70 · jasonjgardner/blockbench-mcp-plugin

heide-oficial · 2026-10-01T01:20:45Z

#69 is merged, so this PR now shows only its own commits: the 11 fixes below plus 3 follow-ups for the CodeRabbit review (device names with trailing dots, spaces or a stream suffix; own-key nodes:// ids; a 10 MB cap on fetched geometry).

Fixes for the HTTP server, settings, resources and file inputs, found while auditing 1.9.3 with Blockbench 5.2.1 on Windows. One commit per issue:

HTTP framing and connection cleanup: Content-Length must be plain digits and at most 16 MB (400/413), Transfer-Encoding gets 501, and refused framing closes the connection. Before, an invalid length made the server re-parse the same request in a loop (a repro counted 10,000 responses to one request before stopping). Each server now tracks its sockets and destroys them when it closes, so an unloaded plugin stops answering on old keep-alive connections; this also covers CodeRabbit's note on fix: listen on loopback only and reject cross-site requests #69 that server.close() leaves accepted sockets open. The SSE stream reader is cancelled when its socket closes, so reconnecting to the same session is no longer refused with 409.
One request at a time per connection: every data event started another request loop, even while one was still waiting for its response, so pipelined requests were answered out of order (a GET behind a slow POST was answered first). A connection now has a single loop, and the bytes that arrive meanwhile wait in its buffer (capped).
Cancelled and orphaned calls: the SDK never answers a cancelled request, so in JSON response mode its POST hung and its stream mapping leaked. When the SDK actually aborts a handler, the POST now gets a -32800 error; ids the SDK ignores, and results that were already produced, are left alone. A POST whose session closes meanwhile gets 404, and the handlers still running when a session closes are aborted. Tools receive the call's AbortSignal. The spec says receivers SHOULD NOT answer a cancelled request; in JSON response mode the POST has to be closed somehow, and clients ignore the late error.
Sessions:
- An initialize that the transport refuses (wrong Accept or Content-Type, invalid JSON-RPC) left a connected McpServer without a session, tracked by the tool and resource registries; it is now closed.
- An initialize sent as a notification is refused with 400.
- Sessions are capped (sessionConfig.maxSessions, 32). At the cap, the least recently active session with no request in flight and no open stream is closed, and 503 is returned only when every session is busy.
HTTP details: HEAD responses carry headers only, Expect: 100-continue gets 100 Continue, and a header section above 64 KiB gets 431 (the buffer could grow without limit).
Settings:
- mcp_instructions is now sent as the server instructions of new sessions.
- An invalid port or endpoint falls back to the default with a warning instead of breaking the plugin load.
- prompts/manifest.json is bundled at build time, so loading prompts makes no jsDelivr request unless a build lacks its own version's prompts.
- save_checkpoint keeps a saved project saved, using the undo system's keep_saved option.
risky_eval:
- A new Enable risky_eval setting (on by default, so nothing changes until it is cleared) hides the tool from connected clients and refuses its calls.
- Code that ran but returned something JSON cannot encode (a cycle, a function, a symbol) is reported as executed. Before, it was an error inviting a retry, or for functions a protocol error.
nodes://: reading a node serialized the three.js object, whose parent's toJSON dumped the scene with geometry, shaders and textures (9 KB for one cube). It now returns the node as Blockbench saves it (getSaveCopy(): from/to, origin, rotation in degrees, faces, ...) plus uuid, type, parent and children.
from_geo_json:
- It promised file paths but refused them, had no undo, fetched any URL, and Codecs.bedrock.parse switched the project format (and could switch tabs) outside any undo.
- It now imports exactly one geometry (or the one named by geometry) into the current project through parseGeometry, in one undo edit, and is offered in formats with bones.
- It reads absolute paths and file:// URLs through Blockbench's permission-checked fs, and parses with autoParseJSON behind a generic error, so the error does not quote the file.
- It refuses loopback, private and local hostnames and redirects, with a timeout and the call's abort signal.
Local file paths: network (UNC, //host), device (\\.\, \\?\, CON, NUL, ...) paths and file://host/ URLs are refused for both from_geo_json and create_texture. On Windows, reading them opens an SMB connection with the user's credentials, and a pipe could freeze Blockbench. The permission prompt shows the path without control characters.
create_texture: it stripped file:// and kept the rest, so file:///C:/My%20Textures/a.png became /C:/My%20Textures/a.png and was never found. File URLs now go through fileURLToPath, relative paths (which resolved against Blockbench's working directory) are refused, and the permission prompt names the file.

Behaviour changes to be aware of:

Clients now receive the default mcp_instructions text ("Generate simple, low-poly models for Minecraft inside Blockbench.") as server instructions. You may prefer an empty default.
At the session cap, an idle client can be closed; its next request gets 404 and spec-compliant clients reinitialize.
nodes:// reads changed shape: Blockbench's save format instead of three.js fields, so rotation is in degrees and default fields are omitted.
from_geo_json is only offered in formats with bones. It refuses relative, network and device paths, data: URLs, local or private hosts and redirects. create_texture refuses relative, network and device paths.
The bundle grows by about 30 KB (the prompts), and IToolContext/IMcpToolContext gain an optional signal.
docs/ and prompts/manifest.json are not regenerated here, although tool and resource descriptions changed.

Not included:

A public hostname that resolves to a private address is not detected; that needs a DNS lookup.
Some side effects of Blockbench's own geometry import still happen outside the undo edit: the parse/parsed events and the visible bounds.
lib/local-files.ts has its own path checks, so this PR does not depend on fix: animation, GeckoLib and display tools #73, which adds the same checks for export writes; one of the two can absorb the other later.

Testing:

bun test: 1,254 pass, 0 fail (main: 1,184). bunx tsc --noEmit: the same errors as main (none new). bun run build and bun run docs:build pass.
The review follow-ups were re-checked live: COM1 .geo.json, nul. and CON:stream are refused before any read, nodes://constructor and nodes://__proto__ are not found, and the import and texture checks below still pass.
In-process repros against server/net.ts: socket kept after unload, invalid Content-Length loop, session leak on a refused initialize, chunked request answered twice. All four are gone.
Live, with all the related PRs loaded together in Blockbench 5.2.1 on Windows 11:
- HEAD without body; 100 Continue; 431.
- A slow POST and a HEAD in one packet, answered in order with the POST body intact.
- The instructions in the initialize result.
- Cancellation: -32800 after 0.8 s instead of a hang.
- The session cap: 40 sessions open, and the oldest idle one gets 404.
- from_geo_json from a file path: 8 elements and 8 groups, removed by one Undo. Refusals of local, private, relative, UNC and file://host sources.
- create_texture with a file:// path containing a space.
- nodes:// of a cube returning its from/to.
- Turning risky_eval off and on.
- The SSE reconnect, unserializable risky_eval and checkpoint checks.
Before/after:
- The earlier checks also ran on a build without these fixes, where they failed.
- The newer ones (pipelining, nodes:// fields, network paths, session eviction) rely on unit tests that fail without the fix.

Related PRs from the same audit: #71 (views and captures), #72 (modeling tools), #73 (animation, GeckoLib and display), #74 (paint and textures), #75 (headless server), #69 (loopback bind). All of them merge together without conflicts (checked).

🤖 Generated with Claude Code

Summary by CodeRabbit

New Features
- Import Bedrock geometry from inline JSON, local files, or public URLs, with geometry selection for multi-geometry files.
- Load textures from absolute local paths or file:// URLs, with permission checks.
- Configure the server host and port. It defaults to localhost; binding to other addresses allows reachable computers to control Blockbench.
- Control whether the risky_eval tool is available; it is enabled by default.
- Node reads include saved model properties and outliner relationships.
- Prompts are bundled when available, with online fetching as a fallback.
Bug Fixes
- Saving a history checkpoint no longer marks a previously saved project as unsaved.
- Improved handling of cancelled requests, concurrent sessions, and malformed HTTP requests.

The HTTP server called listen(port) without a host, so Node bound it to every interface (::) while the log said "localhost". On Windows, allowing the first firewall prompt then exposed every tool, including risky_eval, to the local network. Requests were also not checked for Host/Origin, so a web page could reach the server through DNS rebinding. - Listen on 127.0.0.1 and ::1 by default, one listener each, so http://localhost keeps working for IPv4- and IPv6-first clients; tolerate machines without IPv6. - Add an "MCP Server Host" setting (mcp_host) to expose the server on purpose, with a warning in the log and in the setting description. - Reject requests whose Origin is not a loopback origin and, when listening on loopback, requests whose Host is not a loopback name (403). - Log the real bound address and port. - Unit tests for the policy and socket tests for the server. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

The Host check only runs while the server listens on loopback addresses, because other computers reach it by its address; the Origin check applies in both modes. The README now says so (CodeRabbit review). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

- Content-Length must be digits and at most 16 MB (400/413); Transfer-Encoding is refused with 501, and refused framing closes the connection instead of re-parsing the same request forever. - Track each server's sockets and destroy them when the server closes, so an unloaded plugin stops answering on old keep-alive connections. - Cancel the SSE stream reader when its socket closes, so a reconnect is not refused with 409. - Status texts for 406, 413, 415 and 501. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Every data event started another request loop even while one was still awaiting its answer, so a request pipelined behind a pending tool call (a GET behind a POST) was answered first and responses came out of order. A connection now runs a single loop; bytes that arrive meanwhile wait in its buffer, which may hold about one more request (16 MiB + 64 KiB) before the connection is closed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…OST open The SDK never answers a request whose handler it aborted on notifications/cancelled, so in JSON response mode the POST carrying it never closed and its stream mapping stayed in the transport; a POST whose session closed meanwhile also hung, and closing a session did not abort its running handlers. Each request handler now gets its own abort signal (passed to tools as context.signal), aborted when the SDK cancels the request or the connection closes. A cancelled request is then answered with error -32800, but only when the SDK really aborted its handler: it ignores a falsy requestId such as 0 and a malformed reason, and a batch member that already answered keeps its result. A POST pending when its session closes gets 404. MCP says receivers SHOULD NOT respond to a cancelled request. In JSON response mode the HTTP exchange of the POST must still be closed, and it can only close with a body for every request in it; the client that cancelled ignores the late error. Other transports keep the SDK's silent behaviour. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

An initialize the transport refused (406, 415, invalid JSON-RPC) left its McpServer connected and tracked by the tool and resource registries without a session; its server is now closed. An initialize without an id (a notification) opened a session the client never learned about and whose slot could never be freed; it is now refused with 400. At most maxSessions (default 32) sessions may be open or opening; at the limit, the least recently active session with no request in flight or open stream is closed for the new client (logged), because clients that restart without a DELETE keep their sessions until the 30-minute inactivity timeout. Only when every session is busy does a new initialize get 503. A new session counts toward the limit before its server connects. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

HEAD responses carried the body; clients that send Expect: 100-continue waited for an interim response that never came; and a header section without an end grew the buffer without limit. HEAD now gets headers only, decided per request (the response is told which request it answers), 100 Continue is sent once to the request waiting for its body, and headers over 64 KiB get 431 and close the connection. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…ndle prompts and keep checkpoints saved mcp_instructions was never read; it is now sent as the server instructions of each new session. Behaviour change: every client now receives the setting's default, "Generate simple, low-poly models for Minecraft inside Blockbench.", unless the user clears or edits it. An invalid port or endpoint no longer breaks the plugin load: it falls back to the default with a warning, and the port setting is limited to 1-65535. prompts/manifest.json is bundled at build time, so loading prompts makes no jsDelivr request unless a build lacks its own version's prompts. save_checkpoint passes Blockbench's keep_saved undo aspect, so it no longer marks a saved project unsaved. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

risky_eval, which runs any JavaScript a client sends, was always published. The new Enable risky_eval toggle (on by default, so nothing changes until it is cleared) hides the tool from connected clients and refuses its calls. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Evaluation and serialization fail separately: code that ran but returned something JSON cannot encode is reported as executed, so callers do not run it again. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Reading nodes://<id> serialized the three.js object, whose parent's toJSON dumped the scene with geometry, shaders and textures (9 KB for one cube). It now returns what Blockbench writes for the node into a .bbmodel, its getSaveCopy() (groups without children), plus uuid, name, type, parent and child UUIDs; nodes without getSaveCopy fall back to their registered properties. Registered properties alone are not enough: Blockbench 5.2 registers name, box_uv and render settings for cubes, while from, to, origin and rotation are plain fields. Behaviour change: position, rotation and scale are no longer the three.js transform (rotation was in radians); rotation is Blockbench's in degrees, and fields Blockbench omits at their default, such as a zero cube rotation, are absent. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

… from local files or public URLs from_geo_json promised file paths but refused them, had no undo and fetched any URL. Codec#parse also switched a non-Bedrock project to the Bedrock format even when parsing failed, could close the project for another tab with the same geometry name, and for several geometries opened a dialog that imported later, outside any undo edit. The tool now calls the codec's parseGeometry with import_to_current_project and switch_to_existing_tab: false, imports exactly one geometry (the only one, or the one named by the new geometry parameter), is offered only in formats with bones, and wraps the import in one undo edit with the created nodes, the texture size and box UV mode (uv_mode) and any item display slots; the visible bounds it can grow are not undoable and the description says so. Input is parsed with Blockbench's autoParseJSON (BOM and comments) behind a generic error, since the engine's message quotes part of the input. Local files: absolute paths and file:// URLs without a host, read through Blockbench's permission-checked fs with the path, stripped of control characters, in the prompt; UNC paths, file URLs naming a host and device paths (\\.\, \\?\, NUL, COM1...) are refused, because Windows would open SMB/WebDAV connections with the user's credentials or block on a device. URLs: only public hosts (loopback, private, link-local, site-local, .local/.lan/.internal/.home.arpa and single-label names refused), no redirects, 30 s timeout and the call's abort signal. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…// URLs with fileURLToPath create_texture stripped "file://" and kept the rest, so file:///C:/My%20Textures/a.png became /C:/My%20Textures/a.png and was never found, and it read any path it was given. File URLs are now converted with fileURLToPath, and the shared local-file checks refuse relative paths (they resolved against Blockbench's working directory), UNC paths, file URLs naming a host and device paths before Blockbench's fs permission prompt, which now names the file. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

coderabbitai · 2026-10-01T01:20:59Z

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📒 Files selected for processing (5)

lib/local-files.ts
server/resources.test.ts
server/resources.ts
server/tools/import.test.ts
server/tools/import.ts

🚧 Files skipped from review as they are similar to previous changes (3)

server/resources.test.ts
lib/local-files.ts
server/tools/import.test.ts

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Walkthrough

The update changes network binding and HTTP session handling, adds GeoJSON and local-file support, and updates prompt loading, node-resource output, risky evaluation controls, and history checkpoints. It also adds tests and settings documentation for these behaviors.

Changes

Network access and MCP server

Layer / File(s)	Summary
Listener policy and address configuration `server/net-security.ts`, `server/net-security.test.ts`	The server resolves listener plans and address settings, checks request Host and Origin headers, and classifies local network hostnames. Tests cover address normalization and request acceptance and rejection.
Listener startup and settings `index.ts`, `ui/settings.ts`, `ui/statusBar.ts`, `README.md`, `ui/i18n.ts`, `server/net.ts`, `server/net.test.ts`	Settings expose host binding and bounded port values. Startup resolves addresses, reports warnings, opens listeners, and closes them on unload. Tests cover listener binding and request checks; documentation describes network access behavior.
HTTP processing and session capacity `server/net.ts`, `server/net.test.ts`, `lib/sessions.ts`	HTTP handling validates framing, serializes pipelined requests, supports HEAD and `100 Continue`, and limits sessions through idle-session eviction or 503 responses.
Request cancellation and session instructions `server/server.ts`, `server/net.ts`, `lib/factories.ts`, `lib/mcp-api.d.ts`, `server/net.test.ts`, `index.ts`	Request handlers and tools receive abort signals. Session closure cancels pending work. New sessions receive nonblank instructions, and unload closes each listener.

GeoJSON import and local file access

Layer / File(s)	Summary
Local path validation and permission-checked reads `lib/local-files.ts`, `server/tools/texture/create-texture.ts`, `server/tools/texture.ts`, `server/tools/texture.test.ts`	Shared helpers validate local paths, normalize file URLs, and request filesystem access. Texture loading uses those helpers, and tests cover accepted and rejected path forms.
GeoJSON loading, selection, and import `server/tools/import.ts`, `server/tools/import.test.ts`, `server/tool-conditions.test.ts`	The tool accepts inline JSON, local files, and public HTTP(S) sources. It selects a geometry and imports it through the Bedrock geometry parser in an undoable edit.

Bundled prompt loading

Layer / File(s)	Summary
Prompt manifest selection and validation `lib/promptLoader.ts`, `lib/promptLoader.test.ts`, `index.ts`	The loader selects a version-matching bundled manifest before cache or CDN lookup. It uses a supplied mismatched bundle as a fallback.

Node resource serialization

Layer / File(s)	Summary
Saved node fields and resource output `server/resources.ts`, `server/resources.test.ts`, `build/docs-manifest.ts`	The nodes resource returns UUID, name, type, outliner relationships, and supported saved fields instead of serializing the Three.js object. The resource description documents the returned data.

Risky evaluation control

Layer / File(s)	Summary
Tool availability and evaluation results `lib/constants.ts`, `server/tools/ui.ts`, `server/tool-conditions.test.ts`, `ui/settings.ts`, `ui/i18n.ts`, `tests/action-wrappers.test.ts`	The setting controls `risky_eval` availability. Evaluation failures remain errors, while successful results that cannot be serialized return a status message.

Saved-project checkpoints

Layer / File(s)	Summary
Checkpoint undo behavior `server/tools/history.ts`, `server/tools/history.test.ts`	`save_checkpoint` sets `keep_saved` on its undo aspects. Tests check saved and unsaved project states.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~55 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant MCPClient
  participant NetServer
  participant SessionTransport
  participant ToolHandler
  MCPClient->>NetServer: Send HTTP request
  NetServer->>NetServer: Check Host and Origin
  NetServer->>SessionTransport: Route accepted request
  SessionTransport->>ToolHandler: Invoke with AbortSignal
  MCPClient->>NetServer: Send cancellation notification
  NetServer->>ToolHandler: Abort request signal

Suggested reviewers: jasonjgardner

Merge Risk: ⚪ Minimal · up to b4a91

No actionable merge-blocking issue is established. The node lookup and remote import limits address the previously reported defects; merge after normal build and test checks.

Security Architecture Review

Security architecture risk: 🔵 Low · up to b4a91

The changes reduce default network exposure and add input and execution controls. No newly introduced security vulnerability was established. Remaining uncertainty concerns host filesystem permissions and project ownership during asynchronous imports.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

inferred — The independently attackable scope is a reachable desktop plugin instance: callers can invoke enabled editor tools and JavaScript evaluation, request local-file loading subject to host permission, and initiate outbound imports from the workstation. The inspected interface does not establish separate per-client authorization domains; network reachability remains the principal access boundary.

Trust Boundaries and Controls

observed — The outbound hostname policy explicitly does not detect public names resolving to private addresses. No connected-address enforcement is visible in fetchGeoJson. This is residual exposure rather than an established PR-introduced attack path: the available base fetched arbitrary HTTP(S) URLs without an effective private-host block.
observed — The new local-file path rejects UNC/device references and remote file-URL hosts, then requests the host's permission-checked filesystem. This establishes a plugin-side gate, not proof of per-request or per-file consent after an earlier grant; production host permission semantics were not independently verified.

Resilience and Maintainability Implications

observed — Malformed or oversized framing closes the connection, accepted body size is bounded, and each connection has one request loop with a bounded waiting buffer. These controls improve containment of untrusted input and preserve response ordering on a connection.
observed — Session closure aborts active handler signals and releases pending POST waiters, but cancellation is cooperative and does not imply rollback. GeoJSON mutates the current project after source loading, before a delayed screenshot, without capturing project identity across the await. The base already had an asynchronous source-read and post-mutation response window; live project-switching, repetition, and cross-connection concurrency remain unresolved rather than verified new vulnerabilities.

Hardening Proposals

proposed — For a stronger public-network-only import guarantee, validate resolved and connected addresses and prevent DNS rebinding between validation and connection, while retaining redirect refusal and response limits.
proposed — Define asynchronous mutation ownership and cancellation semantics explicitly: retain or revalidate project identity before import, check cancellation before new side effects, and distinguish cancellation from rollback of an already committed edit.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 77.46% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 71 functions across 29 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main changes to HTTP server security, settings, and file input handling.

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Actionable comments posted: 3

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Inline comments:
Review comments at @lib/local-files.ts:
- Around line 32-35: Update the RESERVED_DEVICE_NAME pattern used by
isAbsoluteLocalPath to recognize reserved Windows device names followed by
trailing spaces or dots and an alternate data stream suffix, while preserving
its existing device-name and extension checks.

Review comments at @server/resources.ts:
- Line 207: Update the direct UUID lookup in the resource resolution flow to
accept a match only when `Project.nodes_3d` owns the `id` property; otherwise
continue through `findByResourceId` and the existing not-found handling. Ensure
inherited keys such as `constructor` and `__proto__` are not treated as nodes.

Review comments at @server/tools/import.ts:
- Around line 74-77: Add a 10 MB response-size limit to the fetch flow before
returning the GeoJSON text: reject responses whose Content-Length exceeds the
limit and stop streaming once the limit is reached while reading the body.
Update the code around `res.text()` so oversized responses are rejected before
they reach `autoParseJSON`.

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Configuration used: Repository: jasonjgardner/blockbench-mcp-plugin/.coderabbit.yaml

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Run ID: c775640e-8c5e-450f-8085-89f5256f6064

📥 Commits

Reviewing files that changed from the base of the PR and between 6295e20 and 47b72b3.

📒 Files selected for processing (30)

README.md
build/docs-manifest.ts
index.ts
lib/constants.ts
lib/factories.ts
lib/local-files.ts
lib/mcp-api.d.ts
lib/promptLoader.test.ts
lib/promptLoader.ts
lib/sessions.ts
server/net-security.test.ts
server/net-security.ts
server/net.test.ts
server/net.ts
server/resources.test.ts
server/resources.ts
server/server.ts
server/tool-conditions.test.ts
server/tools/history.test.ts
server/tools/history.ts
server/tools/import.test.ts
server/tools/import.ts
server/tools/texture.test.ts
server/tools/texture.ts
server/tools/texture/create-texture.ts
server/tools/ui.ts
tests/action-wrappers.test.ts
ui/i18n.ts
ui/settings.ts
ui/statusBar.ts

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jasonjgardner · 2026-10-01T01:43:43Z

Awesome! Thanks for all the recent PRs. I'll finish reviewing #69 and we can target these for the v1.10.0 release.

… as devices Win32 strips trailing dots and spaces from the last path component, so `COM1 .txt` and `com1 ` still open the COM1 device, and `CON:stream` names a stream of the console device. They passed the reserved-name check, and a synchronous read of such a device can block Blockbench. The check now allows trailing dots and spaces and an alternate data stream suffix (CodeRabbit review). Names that only start like a device name, such as `console.geo.json`, are still read. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

`Project.nodes_3d` is a plain object, so `nodes://constructor` or `nodes://__proto__` found an inherited value, skipped the name lookup and the not-found error, and returned made-up node data. A direct id now has to be an own key of `nodes_3d` (CodeRabbit review). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

`res.text()` buffered the whole body, and the 30-second timeout only bounds the time, so a public URL could stream hundreds of megabytes into the Blockbench window before parsing. A declared `Content-Length` above 10 MB is now refused before reading, and an undeclared or wrong one stops the read and cancels the stream as soon as the limit is passed (CodeRabbit review). The parameter description states the limit. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

#70 started sending mcp_instructions to clients, so its never-used default ("Generate simple, low-poly models for Minecraft") would steer every session, including Hytale, PBR and Havok work. The default is now empty, and a stored copy of the old default is treated as unset. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/export-file.ts (#73) repeated the absolute-path check of lib/local-files.ts (#70) without its reserved device names, so COM1.json or nul.json could block Blockbench or report a write that never happened. Export paths now share isAbsoluteLocalPath, and messages strip control characters with displayPath. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

heide-oficial and others added 13 commits September 28, 2026 23:40

fix: report unserializable risky_eval results as executed

109c07f

Evaluation and serialization fail separately: code that ran but returned something JSON cannot encode is reported as executed, so callers do not run it again. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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Comment thread lib/local-files.ts

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Comment thread server/tools/import.ts Outdated

heide-oficial and others added 3 commits September 30, 2026 23:20

jasonjgardner merged commit 6d497cb into jasonjgardner:main Oct 1, 2026
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jasonjgardner mentioned this pull request Oct 1, 2026

feat: v1.10.0 #68

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fix: harden the HTTP server, settings and file inputs - #70

fix: harden the HTTP server, settings and file inputs#70
jasonjgardner merged 16 commits into
jasonjgardner:mainfrom
heide-oficial:fix/server-hardening-and-settings

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heide-oficial commented Oct 1, 2026 •

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