Agent tool schema linter
Paste the tools your agent can call, an MCP server's tool list included, or the events your agents send each other, and see which fields let someone else's words reach the model on the other side.
Tools
AI
- /tools/agent-tool-schema-linter
Agent tool schema linter
Paste the tools your agent can call, an MCP server's tool list included, or the events your agents send each other, and see which fields let someone else's words reach the model on the other side.
- /tools/llm-timeout-check
LLM timeout check
How long one agent task can run before your SDK and loop settings stop it, when the model is silent, trickling or overloaded, and what to set when that is too long.
- /tools/state-machine-analyzer
State machine analyzer
A completeness check for a state machine. Write each state and what its events do, and see which pairs nobody decided, which states can't be reached or left, and where two rules disagree.
-
-
LLM timeout check
How long one agent task can run before your SDK and loop settings stop it, when the model is silent, trickling or overloaded, and what to set when that is too long.
-
State machine analyzer
A completeness check for a state machine. Write each state and what its events do, and see which pairs nobody decided, which states can't be reached or left, and where two rules disagree.
Networking & media
- /tools/call-topology-cost
Call topology cost
Pick a call size and see where a voice call's cost lands for mesh, an SFU, an MCU and a server that is the other peer, with real packet sizes, and what would make it cheaper.
- /tools/ice-pair-ranker
ICE pair ranker
Paste both sides' ICE candidates, as SDP lines, a whole offer, candidate JSON or getStats(): the pairs ICE forms, the ones it drops, the order it tries them, and what to fix.
- /tools/jitter-fec
Jitter and FEC simulator
A minute of voice over a network that delays and loses packets: how much audio the decoder makes up, and which buffer and protection fix it, at what cost in delay and bitrate.
- /tools/loss-playout
Loss and playout simulator
One voice frame is lost. UDP conceals that one frame; TCP recovers it and holds every frame behind it, and each one whose playout time passes while it waits is lost to the listener anyway.
- /tools/rtcp-inspector
RTP / RTCP inspector
Paste an RTP or RTCP packet as hex and see what it says: each field marked on the bytes, the loss and round trip in its reports, and the NACK, PLI, FIR, REMB and TWCC feedback WebRTC sends.
- /tools/sdp-explainer
SDP explainer
Paste a WebRTC offer or answer and see every line: what it sets, which phase of the call reads it, and what breaks a rule, with the RFC for each.
- /tools/stun-decoder
STUN message decoder
Paste a STUN message as hex or a Wireshark hex dump: what it is, what to fix, every attribute with addresses un-XORed, and its integrity checked, TURN long-term credentials included.
- /tools/tcp-throughput
TCP throughput ceiling
A fast link is not a fast transfer. One connection is capped by its window and by packet loss, and on a long path the cap is far below what was paid for.
-
Call topology cost
Pick a call size and see where a voice call's cost lands for mesh, an SFU, an MCU and a server that is the other peer, with real packet sizes, and what would make it cheaper.
-
ICE pair ranker
Paste both sides' ICE candidates, as SDP lines, a whole offer, candidate JSON or getStats(): the pairs ICE forms, the ones it drops, the order it tries them, and what to fix.
-
Jitter and FEC simulator
A minute of voice over a network that delays and loses packets: how much audio the decoder makes up, and which buffer and protection fix it, at what cost in delay and bitrate.
-
Loss and playout simulator
One voice frame is lost. UDP conceals that one frame; TCP recovers it and holds every frame behind it, and each one whose playout time passes while it waits is lost to the listener anyway.
-
RTP / RTCP inspector
Paste an RTP or RTCP packet as hex and see what it says: each field marked on the bytes, the loss and round trip in its reports, and the NACK, PLI, FIR, REMB and TWCC feedback WebRTC sends.
-
SDP explainer
Paste a WebRTC offer or answer and see every line: what it sets, which phase of the call reads it, and what breaks a rule, with the RFC for each.
-
STUN message decoder
Paste a STUN message as hex or a Wireshark hex dump: what it is, what to fix, every attribute with addresses un-XORed, and its integrity checked, TURN long-term credentials included.
-
TCP throughput ceiling
A fast link is not a fast transfer. One connection is capped by its window and by packet loss, and on a long path the cap is far below what was paid for.
Systems
- /tools/fan-out-tail
Fan-out tail latency calculator
A request fans out to N calls and waits for all of them. See how many requests are slow, and what percentile each call needs to meet your target.
- /tools/overload-queue
Load shedding simulator
More requests than a service can answer, for a minute. Your workers, traffic, timeout, retries, queue policy and queue size: who is answered in time, who waits for nothing, and does it recover.
- /tools/metric-cardinality
Metric cardinality calculator
List a metric's labels and how many values each takes, pick where it is stored, and see how many time series it really writes, which change saves the most, and what that backend bills it in.
- /tools/percentile-rollup
Percentiles across hosts
Paste latency histograms from Prometheus, Google Cloud, AWS X-Ray or a log query, or raw latencies. See the service's real p99, how far off it can be, and how wrong the averaged per-host p99 is.
- /tools/capacity-planner
Queueing capacity planner
Requests at a rate, work that takes a while, and a target for how many may wait, at all or longer than a limit. Erlang C answers how many servers, shows what one fewer would cost, and draws the cliff.
- /tools/retry-amplification
Retry amplification calculator
Retries per layer and how deep the chain goes: how many calls reach the bottom service for one user request when every layer retries what it gets, and the extra load on it while it fails.
- /tools/timeout-budget
Timeout budget checker
A call chain's per-try timeouts and retries, top first: the worst case when the bottom hangs, whether it fits the caller's deadline, and which retries can never finish in time.
-
Fan-out tail latency calculator
A request fans out to N calls and waits for all of them. See how many requests are slow, and what percentile each call needs to meet your target.
-
Load shedding simulator
More requests than a service can answer, for a minute. Your workers, traffic, timeout, retries, queue policy and queue size: who is answered in time, who waits for nothing, and does it recover.
-
Metric cardinality calculator
List a metric's labels and how many values each takes, pick where it is stored, and see how many time series it really writes, which change saves the most, and what that backend bills it in.
-
Percentiles across hosts
Paste latency histograms from Prometheus, Google Cloud, AWS X-Ray or a log query, or raw latencies. See the service's real p99, how far off it can be, and how wrong the averaged per-host p99 is.
-
Queueing capacity planner
Requests at a rate, work that takes a while, and a target for how many may wait, at all or longer than a limit. Erlang C answers how many servers, shows what one fewer would cost, and draws the cliff.
-
Retry amplification calculator
Retries per layer and how deep the chain goes: how many calls reach the bottom service for one user request when every layer retries what it gets, and the extra load on it while it fails.
-
Timeout budget checker
A call chain's per-try timeouts and retries, top first: the worst case when the bottom hangs, whether it fits the caller's deadline, and which retries can never finish in time.
Software craft
- /tools/copy-drift
Copy drift
Paste two copies of a function and each one's git log, and see whether they have been changing together or drifting apart, which commits changed only one, and where the copies differ.
- /tools/pr-split-cost
PR split cost
Paste your PRs' sizes and review waits. Get how much the wait grows with size, and what splitting a change into k PRs costs in waiting, reviewed one after another, side by side, or in one sitting.
-
Copy drift
Paste two copies of a function and each one's git log, and see whether they have been changing together or drifting apart, which commits changed only one, and where the copies differ.
-
PR split cost
Paste your PRs' sizes and review waits. Get how much the wait grows with size, and what splitting a change into k PRs costs in waiting, reviewed one after another, side by side, or in one sitting.