Cosmos: Implement binary round trip fuzzer - #4872

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Debdatta Kunda (kundadebdatta) wants to merge 118 commits into

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users/kundadebdatta/4864_implement_binary_round_trip_fuzzer

Commits on Jun 22, 2026

Adding the binary encoding spec.
kundadebdatta
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86121d0

Commits on Jun 25, 2026

cosmos(driver): add binary JSON codec scaffolding (P0a)
kundadebdatta
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ceaf826
cosmos(driver): add binary JSON system-string dictionary (P0b)
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ae6df0a
cosmos(driver): add binary JSON golden scalar test corpus (P0c)
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1dda9b5
cosmos(driver): add binary JSON scalar decoder (P1a)
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b26bf98
cosmos(driver): add binary JSON container decoder (P1b)
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49d3091

Commits on Jun 26, 2026

cosmos(driver): add binary JSON user + reference strings (P1c)
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09f549c
cosmos(driver): add binary JSON extended number forms (P1d-1)
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5cea73e
cosmos(driver): add binary JSON GUID strings (P1d-2)
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8790969
cosmos(driver): add binary JSON base64 strings (P1d-3)
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6888c36
cosmos(driver): add binary JSON compressed strings (P1d-4)
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6472615
cosmos(driver): add binary JSON GUID value and binary blobs (P1d-5a)
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ed12afe
cosmos(driver): add binary JSON uniform number arrays (P1d-5b)
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8eb14d2
cosmos(driver): auto-detect and decode binary JSON responses (P1e)
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7497d0f
cosmos(driver): add minimal-valid binary JSON encoder (P2a)
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ac3b171
cosmos: encode item writes as binary JSON behind a temporary flag (P2b)
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fbc816e
cosmos: formalize binary-encoding enablement as resolved-once config (P3a)
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c93ff81
cosmos: emit binary serialization-format negotiation header on item ops (P3b)
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9976b43
cosmos(driver): add binary JSON decoder robustness tests (P4)
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476a5ab
Add binary JSON support to in-memory emulator with E2E tests
kundadebdatta
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d112555

Commits on Jun 27, 2026

Add live binary-encoding integration test
kundadebdatta
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ec3c4c5
Fix spelling and link-format issues in binary encoding spec
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cffbf8a

Commits on Jul 10, 2026

cosmos(driver): extract shared binary-JSON encode helpers (v2 prep)
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a6a35d6
cosmos(driver): add serde::ser::Error to BinaryError (v2 prep)
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25a46bf
cosmos(driver): add native serde Serializer for binary JSON (v2)
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ece0186
cosmos: encode item writes via native binary serde serializer (v2)
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575fcf7
cosmos(driver): add generative parity property test for binary serializer
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9690f01
cosmos(bench): add text vs binary-v1 vs binary-v2 encode benchmark
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ef4cda6
cosmos(docs): mark binary-encoding spec implemented; document v2 serializer
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eb00d36
cosmos(docs): rewrite binary-encoding spec around the native serde serializer
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aa41cf0
cosmos(driver): add native serde Deserializer for binary JSON
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199dd46
cosmos: decode binary responses via native serde deserializer + add decode bench
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fd71a33
cosmos(docs): document the native serde deserializer in the binary-encoding spec
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efbc9bc
cosmos(docs): fix Mermaid sequence diagram rendering in binary-encoding spec
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21f1e4e
cosmos(docs): make binary-encoding sequence diagram render reliably
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3c8029e
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
kundadebdatta
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3980fb5

Commits on Jul 11, 2026

perf(cosmos/testdata): add sample JSON files for serialization benchmarks
Debdatta Kunda (kundadebdatta)
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66e3e81

Commits on Jul 12, 2026

test(perf): sample testdata and round-trip via binary encoding
Debdatta Kunda (kundadebdatta)
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bd8026a

Commits on Jul 13, 2026

Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
kundadebdatta
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4337025
cosmos(driver): make native binary deserializer reject undersized container counts + add differential fuzz
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073975a
cosmos(driver): cap reference-string expansion to bound O(S^2) decode amplification
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ee93685
cosmos: downgrade item-write serialization logs to debug + document binary feed-splitter coupling
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912ccc5
cosmos: map binary encode failures to a request-body status, not response-body
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d208d09
cosmos(driver): refresh binary_json docs + fix fuzz comment to match shipped codecs
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748dd50
cosmos: pin binary round-trip tests to the current-thread tokio flavor
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4e5a9ec
cosmos(perf): rustfmt binary_sampled_testdata (fix cargo fmt --check)
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3605d6e

Commits on Jul 14, 2026

cosmos: Box::pin query_items futures to satisfy clippy::large_futures
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5961306
cosmos(driver): run backend-failover-exhausting topology tests on tokio paused clock
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1212463
eng: add repo ignore-links.txt for Verify-Links pipeline
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8d647bf
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
Debdatta Kunda (kundadebdatta)
authored
9c4c68c

Commits on Jul 15, 2026

cosmos(driver): run binary-json deep-nesting tests on a large-stack thread
kundadebdatta
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74e80a7
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
Debdatta Kunda (kundadebdatta)
authored
4f5a743

Commits on Jul 16, 2026

cosmos(driver): address PR #4671 binary-encoding review feedback
kundadebdatta
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41cdb1e
cosmos(driver): fix binary-json review regressions from PR #4671 squash
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d786dbf
cosmos(driver): sync binary-encoding spec with post-review code
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13c6dbd
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
kundadebdatta
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7c1807e

Commits on Jul 17, 2026

cosmos(driver): dedup Cow header conversion (PR #4671 review)
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a3acdd7
cosmos: model binary encoding as BinaryEncodingOptions client option (PR #4671 review)
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d404126
cosmos(test): configure binary encoding via client option, not std::env (PR #4671 review)
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8db2e71
cosmos(driver): shrink decoder recursion frame, drop large-stack test helper (PR #4671 review)
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da35b5e
cosmos: add request_text_response to BinaryEncodingOptions (PR #4671 review)
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37e0d9c
cosmos(driver): test response-format negotiation incl. request_text_response (PR #4671 review)
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3cd4800
cosmos(driver): add binary->text transcode primitive + operation directive (PR #4671)
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6b6bf41
cosmos(driver): apply binary->text transcoding on the response path (PR #4671)
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211922e
cosmos: wire request_text_response to driver-side transcoding (PR #4671)
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92e343e
cosmos(driver): document driver-side transcoding in binary-encoding spec (PR #4671)
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b12a6d2
cosmos(driver): surface request_text_response across the binary-encoding spec (PR #4671)
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2ce27ed
cosmos(driver): align spec change-map with the shipped transcoding code (PR #4671)
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e89c883
cosmos(driver): reflow binary-encoding spec paragraphs to full width (PR #4671)
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af05deb

Commits on Jul 19, 2026

Commits on Jul 20, 2026

cosmos(driver): add text->binary transcode primitive (PR #4671)
kundadebdatta
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7f4bea5
cosmos(driver): add BinaryEncodingOptions to OperationOptions (PR #4671)
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11d8b38
cosmos(driver): apply binary encoding from OperationOptions in execute path (PR #4671)
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90e1d26
cosmos: re-export driver BinaryEncodingOptions, route encoding via OperationOptions (PR #4671)
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58f0aee
cosmos(native): expose binary encoding to FFI callers via CosmosOperationOptions (PR #4671)
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0360e2c
cosmos(driver): document driver-owned binary encoding + FFI reuse (PR #4671)
kundadebdatta
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12603e2
cosmos: address latest Copilot review round (PR #4671)
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d2c6aaf
cosmos(driver): resolve binary_encoding via layered view, guard to point ops, drop vestigial directive (PR #4671)
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c4a6a47
cosmos(driver): support i128/u128 in binary serializer, document byte-field size caveat (PR #4671)
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6d4f86d
cosmos(driver): bound decode output for uniform arrays of empty number arrays (PR #4671)
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cae2476
cosmos(driver): tighten verbose comments from the binary-encoding review fixes (PR #4671)
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58ba24a

Commits on Jul 21, 2026

Commits on Jul 22, 2026

cosmos(driver): fix cspell failure in BINARY_ENCODING_HLD Mermaid diagram (PR #4671)
kundadebdatta
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d4a6cca
cosmos(driver): clear binary_encoding on PATCH sub-ops so patch stays text (PR #4671)
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e7528d4
cosmos(driver): drop Delete from supports_binary_encoding to match spec scope (PR #4671)
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9ae1b66
cosmos(driver): trim redundant patch-handler binary-encoding comments (PR #4671)
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bb517f5
cosmos(perf): generalize binary_sampled_testdata resource names (PR #4671)
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edc67dd
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
Debdatta Kunda (kundadebdatta)
authored
63f2bb2

Commits on Jul 23, 2026

cosmos(driver): address PR #4671 binary-encoding review feedback (tvaron3)
kundadebdatta
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130694d
cosmos: honor operation-level binary_encoding over the client default (PR #4671)
kundadebdatta
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e78ea5b
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
Debdatta Kunda (kundadebdatta)
authored
9bf54fc
perf(cosmos): untrack the 507MB testdata JSON corpus, keep it local
kundadebdatta
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e8d385f
eng: remove repo ignore-links.txt (moving link exclusions to a separate infra PR)
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abce917
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
kundadebdatta
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47dba7e

Commits on Jul 24, 2026

cosmos: address Copilot review findings on PR #4671
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13e260a
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
kundadebdatta
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c132419
Merge branch 'main' into users/kundadebdatta/4646_implement_binary_encoding_in_driver
kundadebdatta
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12e1dc4
cosmos(driver): add RFC-style binary-encoding wire-format spec and a fuzzer implementation
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f89e87c
test(cosmos-perf): add fuzzer dev-deps (arbitrary, arbitrary-json, json-canon, sha2)
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3b142c3
test(cosmos-perf): extract Cosmos-calibrated normalize_numbers (fuzzer Phase 2)
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7ed1062
test(cosmos-perf): canonicalize via json-canon (RFC 8785) + SHA-256 (fuzzer Phase 3)
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1f47bcf
test(cosmos-perf): generate documents via arbitrary-json (fuzzer Phase 4)
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4373d0d
docs(cosmos): record fuzzer crate-refactor status + json-canon safe-integer finding (Phase 5)
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4ae53d2
docs(cosmos): record Phase 5 live validation (18/18 calibration MATCH, 1500 round-trips clean)
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54cff04
docs(cosmos): add visualized 'how it works' section to the round-trip fuzzer design
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dd98c47

Commits on Jul 25, 2026

test(cosmos-perf): exercise all four binary point ops in the fuzzer (create/read/replace/upsert)
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7240b41
docs(cosmos): record 12,000-round-trip 4-op soak (create/read/replace/upsert)
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af4b621
test(cosmos-perf): hybrid depth-controlled generator for deep/complex JSON
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32bc4e8

Commits on Jul 28, 2026

test(cosmos): add cargo-fuzz codec crate and enrich round-trip generator
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e1d776e