Layer 2 — application architecture · 1,820 documents
| ID | Document | Source |
|---|---|---|
| app_invariants__2b0eab0d7144c7f4 | INVARIANT: Hydration Structural Quorum SHADOW: Requires the client-side DOM to reach a perfect structural match with server-rendered HTML before enabling interactivity, ensuring state… | — |
| app_invariants__ab2e39efc825f094 | INVARIANT: Subscription Lifecycle Atomicity SHADOW: Guarantees that every reactive subscription is paired with a mandatory teardown mechanism to prevent memory leaks and orphaned execution… | — |
| app_invariants__24e550af9bbf2c2c | INVARIANT: Rune-Based Variable Shadowing Prevention SHADOW: Protects the integrity of the reactivity DSL by forbidding the use of reserved symbols ($state, $derived) in non-reactive scopes. BYPASS:… | — |
| app_invariants__e4170fb96730e2b0 | INVARIANT: State mutations are captured in isolated batches and flushed atomically to prevent intermediate inconsistent renders. SHADOW: Ensures the UI only reflects fully resolved state… | — |
| app_invariants__1454adddb4a23590 | INVARIANT: State updates are aborted if the new value is strictly equal to the current value (or safely equal for objects/NaN). SHADOW: Prevents infinite loops in reactive graphs and eliminates… | — |
| app_invariants__e7f0bdab5dc7ff6b | INVARIANT: Synchronous operations are deduplicated and deferred to the end of the current execution tick via a microtask queue. SHADOW: Prevents main-thread blocking by coalescing high-frequency… | — |
| app_invariants__bc32538115422d8b | INVARIANT: Reactive proxies must be deeply traversed and cloned to extract a static, immutable representation of the current state. SHADOW: Allows developers to capture a point-in-time value of a… | — |
| app_invariants__ce5c70e8026f824e | INVARIANT: Server-side asynchronous state must be serialized into a deterministic string format and embedded in the DOM for client-side reconstruction. SHADOW: Bridges the gap between… | — |
| app_invariants__168b4fd6a8c2b362 | INVARIANT: Toolchain Provenance Enforcement SHADOW: The system mandates that the Go toolchain revision used at compile-time must match a hard-coded embedded hash. This prevents 'ghost' builds from… | — |
| app_invariants__d6a23df0f8e6be75 | INVARIANT: All-or-Nothing Persistence SHADOW: Writes to the JSON database must utilize atomic file operations (write-to-temp then rename). This neutralizes the risk of data corruption where a crash… | — |
| app_invariants__511d7bdc7f4a8d39 | INVARIANT: Transition-Only Timestamp Updates SHADOW: Kubernetes status conditions must only update their 'LastTransitionTime' if the 'Status' value actually changes. This prevents reconciliation… | — |
| app_invariants__1790ac4b8a435912 | INVARIANT: Architectural Identity Immutability SHADOW: Core resource identifiers, such as ProxyGroup types and Tailnet targets, are immutable post-creation. Changing these mid-lifecycle is forbidden… | — |
| app_invariants__abf053fce2ff03fd | INVARIANT: HA Storage Consistency Requirements SHADOW: Session recorders running multiple replicas must use shared S3 storage. This enforces a 'Single Source of Truth' for recordings; otherwise, a… | — |
| app_invariants__299aed19e6358ee8 | INVARIANT: Identity Header Sanitization SHADOW: The API server proxy must strip all incoming 'Authorization' and 'Impersonate-*' headers before injecting its own derived identity headers. This… | — |
| app_invariants__83c3231bc1dcad40 | INVARIANT: Stream Metadata Precedence SHADOW: In session recording, the Asciinema 'CastHeader' must be successfully transmitted before any payload data is accepted. This is a hard requirement for… | — |
| app_invariants__606f6d1ec7555229 | INVARIANT: Flap-Resilient Log Suppression SHADOW: Network monitoring logs must be rate-limited per unique format string during 'major' link changes. This prevents a 'log DoS' where rapidly toggling… | — |
| app_invariants__bd4146a0c5ff762f | INVARIANT: Gateway Cache Invalidation on Rebind SHADOW: Any network change flagged as requiring a socket rebind must force a full invalidation of the home router IP cache. Stale gateway data is… | — |
| app_invariants__87ddce165ec7db50 | INVARIANT: File-based DNS configuration updates must be atomic to prevent partial or corrupted states from affecting live resolution. SHADOW: Failure to ensure atomic file writes can lead to a… | — |
| app_invariants__ac034fbc5974a189 | INVARIANT: The system must self-heal and re-apply its desired DNS configuration upon detecting external restarts or state resets of critical OS DNS services. SHADOW: If the underlying… | — |
| app_invariants__7c6e4127f08971f4 | INVARIANT: Critical configuration objects must be clonable to ensure deep copies for immutable state or safe concurrent modification patterns, preventing unintended side effects and data… | — |
| app_invariants__6c259f9cc6bab177 | INVARIANT: DNS queries to upstream resolvers must be orchestrated with delays and racing mechanisms to maximize resilience against latency, partial network failures, and slow responders. SHADOW:… | — |
| app_invariants__6a40edc3ec79fb4e | INVARIANT: Network state changes must trigger the invalidation and re-establishment of external port mappings to maintain reachability and prevent stale or non-functional NAT rules. SHADOW: If… | — |
| app_invariants__962c4a37bd299721 | INVARIANT: Port mapping requests must be idempotent such that retries or duplicate calls do not result in multiple, conflicting, or unintended NAT mappings. SHADOW: Without idempotent port mapping,… | — |
| app_invariants__7f14c1ba204558e1 | INVARIANT: Network connection sockets must be explicitly bound to a specific network interface or isolated namespace to prevent routing loops and ensure traffic correctly egresses the host… | — |
| app_invariants__07992cb66e616261 | INVARIANT: The local cache of system proxy settings must be invalidated upon detection of network interface or routing table changes to ensure up-to-date proxy selection. SHADOW: Relying on stale… | — |
| app_invariants__4c49b79b50ab7ef2 | INVARIANT: All TLS connections must verify server certificates against both system-provided and baked-in fallback CA roots to ensure cryptographic trust, even on systems with incomplete or outdated… | — |
| app_invariants__b0c2603d6ed184b4 | INVARIANT: Each DNS query transaction ID must be strictly validated against the corresponding response to prevent cache poisoning and ensure the integrity of DNS replies. SHADOW: Mismatched… | — |
| app_invariants__850508113a0d5c88 | INVARIANT: UDP relay endpoints must be explicitly expired and garbage collected after predefined bind and steady-state lifetimes to manage server resources and prevent accumulation of stale… | — |
| app_invariants__b6219c4ea98247bb | INVARIANT: UDP relay endpoint allocations must be ordered using Lamport IDs to ensure a consistent global ordering of allocation events across clients, resolving race conditions from concurrent… | — |
| app_invariants__3f3395b71557c3e3 | INVARIANT: UDP GSO/GRO (Generic Segmentation/Receive Offload) must gracefully fall back to single-packet I/O if kernel errors indicate that offload capabilities are not supported or have failed… | — |
| app_invariants__7d74645c8f5c4d4b | INVARIANT: All modifications to IP addresses within a packet must be accompanied by a recalculation and update of relevant checksums to maintain data integrity. SHADOW: Failing to update checksums… | — |
| app_invariants__ad10753f6ce82f02 | INVARIANT: The system must continuously validate the host's IP forwarding configuration and warn of misconfigurations that prevent subnet routing or exit node functionality. SHADOW: Incorrect IP… | — |
| app_invariants__16d02b086c769f41 | INVARIANT: Active system network connections must be closed on detection of network link changes to prevent them from becoming stale or routing incorrectly. SHADOW: Network interface changes (e.g.,… | — |
| app_invariants__a99f4a233a71ad9e | INVARIANT: DNS responses must be clamped to advertised EDNS buffer sizes and marked as truncated when necessary to ensure interoperability with clients and prevent packet loss. SHADOW: Sending DNS… | — |
| app_invariants__093006f9cce20f88 | INVARIANT: Recursive DBus connection attempts to systemd-resolved must employ exponential backoff and retry logic to avoid resource exhaustion and gracefully handle transient daemon… | — |
| app_invariants__79e9a8d0be43ee1a | INVARIANT: The health of DNS forwarding must be actively monitored and surfaced as a critical warning to promptly alert operators of resolution failures affecting connectivity. SHADOW: Unmonitored… | — |
| app_invariants__da178f9f791d31a0 | INVARIANT: IP packet parsing must rigorously validate header lengths and fragmentation offsets to prevent fragmentation-based firewall bypass attacks. SHADOW: Malformed or intentionally crafted IP… | — |
| app_invariants__fe8b5f37f26520b9 | INVARIANT: Virtual Network Identifiers (VNIs) for UDP relay sessions must be unique across all active endpoints to prevent misrouting and cross-talk between sessions. SHADOW: If multiple relay… | — |
| app_invariants__8c72fb59a0380621 | INVARIANT: Error logging for frequently failing operations (e.g., proxy detection) must be rate-limited to prevent log spam and disk/CPU resource exhaustion. SHADOW: Without rate-limiting, a… | — |
| app_invariants__68d00eb109244549 | INVARIANT: Tuple identity must remain stable regardless of field order or alignment optimizations. SHADOW: The Tuple is the primary index for flow tracking. If the serialization or mapping logic… | — |
| app_invariants__f811f1cc79cbce43 | INVARIANT: Captive portal detection must terminate immediately upon the discovery of any single positive signal. SHADOW: The detection logic runs probes in parallel to minimize latency on… | — |
| app_invariants__4be304c8bcaf6ff5 | INVARIANT: The identification of a protocol stream must occur within the first read operation without consuming the stream content. SHADOW: The muxer must peek at the protocol identifier (the… | — |
| app_invariants__b30e332ddb755eef | INVARIANT: Network state discovery must prioritize reaching the preferred region node over global probing when latency data exists. SHADOW: Probing logic uses historical latency to suppress regional… | — |
| app_invariants__203b5fc287341745 | INVARIANT: Capability versions are monotonically increasing integers representing supported protocol semantics. SHADOW: This ensures backward and forward compatibility between the coordination… | — |
| app_invariants__f7863962904e6080 | INVARIANT: Node identities are immutable and globally unique per control plane URL. SHADOW: Assigning a permanent ID that is never reused prevents 'identity collision' or 'ghosting' where stale… | — |
| app_invariants__5ab7e7c818b702bf | INVARIANT: Registration and configuration updates are transactional, guarded by cryptographic signatures. SHADOW: By requiring node keys and signatures for registration and health updates, the… | — |
| app_invariants__1a3bc4065549c34b | INVARIANT: Control plane communication handles state delta-encoding to minimize bandwidth and processing overhead. SHADOW: Incremental updates (delta-encoding) prevent massive CPU and network spikes… | — |
| app_invariants__d08b3b93b8135b8d | INVARIANT: Session exit status and completion state are idempotent. SHADOW: The `sess.exited` flag ensures that a session's exit status is set only once, preventing inconsistencies if multiple exit… | — |
| app_invariants__e1529e517ee1cbdb | INVARIANT: SSH connection deadlines are consistently updated and enforced across all I/O operations. SHADOW: The `serverConn.updateDeadline` method ensures that network I/O operations (Read, Write)… | — |
| app_invariants__12995d338285c722 | INVARIANT: Outgoing channel data is strictly flow-controlled, preventing remote buffer overflows. SHADOW: The `channel.WriteExtended` method respects the `maxRemotePayload` size and the remote… | — |