| # Sample-level ground truth by counterfactual replay |
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|
| One file per latent corpus and grain, |
| `<instance>/latent/seed=<k>/seqtruth-forced-ok-counterfactual-<request|session>.json`: |
| 25 corpora × 2 grains = 50 files. `index.json` lists every file with its size, its sha256 and its counts. |
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| The files are derived from the latent corpora under `instances/` (tool version 0.3.0). They sit outside the corpus |
| folders, so every corpus still verifies against its own `manifest.json`. Licence: CC BY 4.0, as the corpora. |
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|
| ## What a file holds |
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|
| The truth edges of the sample-level graph of every sampled test trace of one corpus at one grain. A truth edge joins two |
| failed attempts of one request. It is decided by counterfactual replay: the simulator re-runs the request with the earlier |
| attempt set to ok and every random draw unchanged. The pair is a *but-for* edge if the outcome of the later attempt |
| changes. It is a *contingent* edge if it is not a but-for edge and the outcome changes once the other failed callees of |
| the same caller are set to ok in both runs. At the session grain the client's error record of a request is also a target |
| of that request's BFF attempt. Pairs whose target succeeded, pairs across requests, and pairs between two client attempts |
| of one journey step are not scored. |
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| The traces are the test sample of the reference evaluation (`read` names the run): the test split in completion order |
| (`ordering: end`), at most `max_len` tokens per trace, pairs at most `max_lag` positions apart. |
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| ## Format |
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| Header: |
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| - `corpus_id`, `grain`, `split`, `read`, `ordering`, `c`, `max_len`, `max_lag`: the corpus and the sample. |
| - `counts`: `sequences` (sampled traces), `sequences_with_candidates` (traces with a scored pair), `sequences_with_truth` |
| (traces with a truth edge), `candidates` (scored pairs), `truth_directed` (truth edges). The `*_landed` counts refer |
| to a truth read from the recorded parent of each span; they are kept for comparison and are not the truth of this file. |
| - `directed_pairs`: the truth edges by kind (`single` = but-for, `contingent_only` = contingent; by source; by whether |
| the call is critical; by whether the two event types are an edge of the population-level summary graph). |
| - `dropped_candidates`: pairs left out of the scored pairs (`ok_target`, `client_retry`, `unmapped`). |
| - `mapping`, `reruns`, `rerun_pairs_not_scored`, `old_against_new`: bookkeeping of the build. `oracle_check` gives, per |
| re-run shard, the number of client records, hops and sessions that were compared with the corpus's oracle tables. |
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| `sequences`, one entry per sampled trace: |
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| - `seq`, `trace_id`: the trace's index in the sample and its identifier in the corpus's views. |
| - `length`: positions of the stored sequence: a start marker, the trace's tokens (at most `max_len`), an end marker. |
| - `healthy`: true when the trace has no failed attempt. |
| - `req`: one entry per window index `t = 0 … length − c − 1`, the request identifier (as in the corpus's oracle tables) |
| of the token at that index; `null` for the end marker and for a position that no request could be assigned to. |
| Window index `t` is token number `c + t − 1` of the trace, counting from 0. |
| - `pairs`: lists in the order of `pair_fields`: |
| `j`, `q` (window indices of the source and the target, `j < q`); |
| `column` (`directed`: a truth edge; `ancestor`: another failed attempt of the request that changes under the same |
| replay, not a truth edge); |
| `single` (true: but-for); `contingent` (true: the target changes with the caller's other failed callees set to ok); |
| `source` (`final`: the callee's last attempt; `attempt0`: a first attempt that was retried; `edge`: the BFF attempt, |
| with the client's error record as target); |
| `critical` (whether the call is critical; `null` for the client pair); |
| `token_j`, `token_q` (the two tokens, so that the indexing can be checked). |
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