Generator: unify SDK ↔ server types and seeding (single source of truth) #117
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Generator: unify SDK ↔ server types and seeding (single source of truth)
Context
The codegen currently produces parallel shapes for the same OSchema object, runs three competing seeders that all bypass the typed SDK, and leaks server-managed fields (
sid,created_at,updated_at) into the SDK send surface as if callers could assign them. None of that is principled.What's divergent today
Types. PR #114 (
2aeee22) made codegen emit a singletypes.rs, but the divergence moved up to the import level:OTimeis the WASM-compat newtypepub struct OTime(pub String); #[serde(transparent)](emitted fromcrates/generator/src/rust/rust_struct.rs).OTimeishero_rpc_osis::otoml::OTime = pub struct OTime(u32)with manualSerialize→str(referenced fromcrates/generator/src/rust/rust_osis.rs:1316).Both serialize to a wire string, but
OTime::default()produces""on the SDK side, which the server'sFromStrrejects (length != 19).01_walkthrough.rs:296-304documents the resultingrecipe.setround-trip break.Seeders. Three paths, none using the typed SDK:
hero_osis/crates/hero_osis_server/src/bin/seed.rs— CLI, raw JSON-RPC via reqwest.hero_rpc/crates/osis/src/seed/seeder.rs— library variant, also raw JSON-RPC.Server-managed fields in the SDK input shape.
recipe_set(data: Recipe)accepts a fullRecipeincludingsid/created_at/updated_at. The server overwrites them on every call. Wire bytes wasted; API misleadingly suggests they're settable.CRUD semantics conflated. Today
recipe_new()returns a default Recipe (no-op create), andrecipe_set(data: Recipe)does both create-if-no-sid and update-if-sid. That collapses CREATE and UPDATE into the same wire method, which is non-standard, confuses generated OpenRPC consumers, and makes input validation ambiguous.What this does
1. One canonical
OTimeMake
herolib_otoml::OTimeWASM-safe by gatingOTime::now()behind#[cfg(not(target_arch = "wasm32"))]. The type itself (pub struct OTime(u32)with string-on-wire serde) compiles to WASM. Both SDK and server import it fromherolib_otoml. Delete the SDK-sideOTime(pub String)newtype emission fromrust_struct.rs. Same principle applies to any other type that currently has a parallel WASM-compat shape — audit and unify.2. One generated type per OSchema definition
SDK + server share the same
Recipe,Collection, etc. — no per-side variants.#[cfg(target_arch = "wasm32")]gating happens only at the API-surface layer (e.g.OsisRecipesis native-only), never at the data-type layer.3. Server-managed fields are not part of the SDK input shape; CRUD is split
Emit a
RecipeInput(user fields only) alongsideRecipe(full, with server-managed fields). The trait splits CREATE / UPDATE:The OpenRPC spec naturally advertises two schemas per root object (
RecipeInput,Recipe) — input/output split visible to every language SDK consumer.4. One seeder, three modes
Delete:
hero_osis/crates/hero_osis_server/src/bin/seed.rs(CLI binary + service.toml + Makefile entries + docs/SEEDING.md references).hero_rpc/crates/osis/src/seed/(library module).Replace with a generated typed-SDK helper exposed as a
seedmodule on each scaffolded SDK crate:Feature-gated (
seed = ["rand", "rand_chacha"]) so SDK consumers who don't seed don't pay the dep cost.5. Cross-language alignment
Once the unified contract is in place, audit every other language SDK generator (Python, JS, Rhai) so they emit the same Input/Output split, the same CRUD method signatures (
new(input) -> sid,set(sid, input) -> ()), and consume the same OpenRPC schemas. Smoke-check that each language SDK still compiles and can be instantiated against the recipe_server example.The full per-language end-to-end test surface that proves wire compatibility across all SDKs lives in #115 (workspace-root
tests/crate). This issue only needs to ensure that the contract is aligned; #115 implements the test coverage.6. ADR
New ADR at
docs/adr/002-single-source-of-truth-types-and-seeding.mdcodifying:OTime, etc.), not via parallel codegen.*Inputtypes.new(input) -> sidfor CREATE,set(sid, input) -> ()for UPDATE — semantics distinct, never conflated.blank/random/from_dirmodes.Link from
CLAUDE.mdand thehero_service_scaffoldskill inlhumina_code/hero_skills.Acceptance
Recipe/ oneOTimeshape used by SDK and server alike —grepconfirms no duplicate emissions across the codegen.RecipesClient::recipe_new(client, None, RecipeInput::default()).awaitround-trips cleanly to an in-processOsisRecipesserver and returns aSid.RecipesClient::recipe_set(client, None, sid, RecipeInput { name: "x".into(), ..Default::default() }).awaitupdates the row.RecipesClient::recipe_get(client, None, sid).awaitreturns a fullRecipewhosecreated_atdeserializes successfully.hero_recipes_sdk::seed::random(&client, 10, 0xDEAD_BEEF).awaitpopulates 10 records of each root object;cargo bench -- recipe/list_full(after #113 lands) measures non-empty serialization cost.cargo check --target wasm32-unknown-unknown -p hero_recipes_sdkpasses.hero_osis_seedbinary + crate path entries are gone;data/mock/either moves into example workspaces or stays where it is and the new helper accepts an explicit path.01_walkthrough.rsexercises a realrecipe_new(RecipeInput { name: "...".into(), ..Default::default() })round-trip; OTime caveat block deleted.Blocks
seed::randomfrom this issue.Out of scope
tests/) #115Design proposal — implementation will start after sign-off
Audit done against
development(87289a1on hero_rpc,f171b96on hero_osis,5b3e47a0on hero_lib). Worktrees at/tmp/hero_rpc_117,/tmp/hero_osis_117,/tmp/hero_lib_117. Posting concrete generated-code snippets, deletion list, and a handful of decisions I want your call on before I write a line.1. herolib_otoml WASM audit — only
OTime::now()needs gatingRead the whole crate at
/tmp/hero_lib_117/crates/otoml/src/. Items inspected:OTime,OCur,OLocation,OAddress,OAddressBuilder,dump_otoml/load_otoml,dump_obin/load_obin,OtomlSerialize,normalize_keys, theerrormodule. Exactly one call breakswasm32-unknown-unknown:crates/otoml/src/otime.rs:138-146SystemTime::now()is unavailable onwasm32-unknown-unknown. Everything else is pure math, string parsing, serde, ortomlcodec — already WASM-safe. Nostd::fs, nostd::thread, nostd::net, nostd::process, nochrono. So the fix is one cfg gate:That's it.
OTime::default()isOTime(0), which serializes via the existing manualSerializeimpl to the valid 19-character string"1970-01-01 00:00:00"— so the wire round-trip works without any extra change, andRecipeInput::default()(below) round-trips cleanly.hero_rpc_osis::otomlis already apub use herolib_otoml as otomlre-export (osis/src/lib.rs:71) — no separate type, just a path alias. So the codegen's "server-side OTime" and "SDK-side OTime" diverge only because codegen emits a parallelpub struct OTime(pub String)newtype; once that emission goes away, both sides resolve to the sameherolib_otoml::OTime.2. Codegen import diff
Delete
generate_builtin_types()incrates/generator/src/rust/rust_struct.rs:1080-1213— the entire block that emits theOTime(pub String)newtype plus the parallelOCur/OLocation/OAddressstructs.Add at the top of every emitted
types.rs(thegenerate_types_rsorchestrator that calls intorust_struct.rs):Change the primitive-to-Rust mapping in
rust_osis.rs:1316-1319:Both sides now resolve
OTimeto the sameherolib_otoml::OTimevia the file'suseline. No more two-OTime-shapes.3. Unified Recipe / RecipeInput emission
rust_struct.rs::generate_struct()(line 468) today injectssid/created_at/updated_atinto the single emitted struct whenobj.is_root_object. It also readspub created_at: u64(notOTime) andpub updated_at: u64— see lines 484-489. Two changes:Change A — bump server-managed timestamps to
OTime(matches the explicitcreated_at: otimealready declared inexamples/recipe_server/schemas/recipes/recipes.oschema:20):Change B — for each rootobject, emit two structs from one schema definition: a
<Name>Input(the user-supplied surface) and a<Name>(the full server-visible row). Below is the exact emission shape the newgenerate_struct()produces for the recipe schema (I traced the existing format!() calls so this is what bytes hit disk, not a paraphrase):Non-rootobject types continue to emit one struct, unchanged. The split only applies to
[rootobject]-marked types.Schemas that currently declare
sid: str/created_at: otimeinline (like recipes.oschema:9, 20) keep the schema clean — the codegen's existing dedup logic at rust_struct.rs:495-499 already skips re-emitting fields namedsid/created_at/updated_aton root objects, so no schema edits required. (Side note:# Recipe [rootobject]in that file is currently a comment after PR #108 tightened the marker rule — that's a separate bug; will flag in a follow-up if you don't want me to fix the marker as part of #117.)4. CRUD method emission — split new/set, drop the leaky
&mutToday
rust_osis.rs::generate_crud_methods()emits the OSIS in-process API (the OsisApp/OsisRecipes methods called from the wire dispatcher). After this change:The wire trait (rust_rpc.rs) follows the same shape. The two
_new_from_otoml/_new_from_jsonhelpers at rust_osis.rs:461-484 are dropped — TOML loading moves into the SDK seeder (§5).5. Typed-SDK seeder —
seed::{blank, random, from_dir}Lands at
crates/hero_recipes_sdk/src/generated/seed.rs(and analogously for every scaffolded SDK). Feature-gated so non-seeding consumers don't pay the dep cost:Generated module:
5.1 Per-field generator emission (driven by
ui_emit::FieldKind)For every
<Name>Inputstruct the codegen emits arandom_<name>_input(&mut R)private helper. The dispatch table is taken fromcrates/generator/src/build/ui_emit.rs:65-78:FieldKindseed.rs)Strlipsum::lipsum_with_rng(&mut rng, 4)SignedInt(rng.gen::<i32>() % 1000) as <T>UnsignedInt(rng.gen::<u32>() % 100) as <T>Floatrng.gen::<f64>() * 100.0Boolrng.gen::<bool>()OTimeOTime::from_epoch(rng.gen_range(1577836800..1798761600))(2020 – 2026)Enum(vs)vs[rng.gen_range(0..vs.len())].parse().unwrap()PrimitiveListJsonserde_json::json!({})(placeholder; nested-object generation is OOS)ui_emit::FieldKinddoesn't currently express which primitive aSignedInt/UnsignedIntis — codegen already maps that, so we read it from theTypeExprdirectly and just useFieldKindto choose the generator category. (Theui_emitmodule stays untouched; we add a newseed_emit.rsnext to it that depends on the same kind-resolution helpers.)6. Deletion list (every file / Makefile line / doc that goes away)
hero_rpc (worktree
/tmp/hero_rpc_117)crates/osis/src/seed/— entire directory (mod.rs+seeder.rs)crates/osis/src/lib.rs:61-62— drop the#[cfg(not(target_arch = "wasm32"))] pub mod seed;linescrates/generator/src/rust/rust_osis.rs:461-484— the_new_from_otoml/_new_from_jsonemission (TOML ingest moves to SDKseed::from_dir)crates/generator/src/rust/rust_struct.rs:1080-1213—generate_builtin_types()(OTime/OCur/OLocation/OAddress WASM-newtype emission)hero_osis (worktree
/tmp/hero_osis_117)crates/hero_osis_server/src/bin/seed.rs— entire filecrates/hero_osis_server/service.toml:308-311— the[[binaries]] name = "hero_osis_seed"blockcrates/hero_osis_server/Cargo.toml— the[[bin]] name = "hero_osis_seed"declaration (if present)docs/SEEDING.md— entire file (relevant TOML format reference will move into a comment inseed::from_dir's docs)scripts/run.rhai:13— drop"hero_osis_seed"fromBINARIESscripts/build.rhai:12— drop"hero_osis_seed"fromBINARIESscripts/install.rhai:13— drop"hero_osis_seed"fromBINARIESPURPOSE.md:15— drop thehero_osis_seed — seeding toolbullethero_lib (worktree
/tmp/hero_lib_117)crates/otoml/src/otime.rs:139— the#[cfg(not(target_arch = "wasm32"))]gate onOTime::now().hero_skills
skills/.../hero_service_scaffold.md— link to the new ADR.7. ADR
New file
docs/adr/002-single-source-of-truth-types-and-seeding.mdcodifying the five rules from the issue body. Linked from:/tmp/hero_rpc_117/CLAUDE.mdlhumina_code/hero_skills/skills/.../hero_service_scaffold.md8. Cross-language SDK alignment
After the Rust side compiles + the recipe_server round-trips, audit and update:
crates/generator/src/js/js_struct.rs— emitRecipeInput/Recipesplit +recipeNew(input) → sid,recipeSet(sid, input) → voidcrates/generator/src/rhai/rhai_struct.rs— same split, Rhai-idiomaticcrates/generator/) —RecipeInputdataclass + new method signaturesexamples/recipe_server/sdk/<lang>/is exercised against the live recipe_server (this is the §5 acceptance criterion — full wire conformance per-language is what #115 covers).9. Open questions — please decide before I start coding
Q1 — server's
--seed-dirstartup hook.hero_osis_serverhas a--seed-dirflag (referenced fromtests/e2e/run.sh:83,tests/e2e_seed.rs,GETTING_STARTED.md:190). It callshero_rpc_osis::seed::*at startup. Withcrates/osis/src/seed/deleted, this flag goes too. Thetests/e2e_seed.rsintegration tests then need a different entry point. Options:--seed-dirfrom the server. Rewritetests/e2e_seed.rsto spawn the server, then call the SDK seeder'sfrom_dirfrom the test body.--seed-dirbut reimplement it inside the server as a thin in-process call into the typed-SDK seeder (server depends on its own SDK).I lean (A) — it preserves the "typed SDK is the only blessed seeder" rule from the ADR — but (B) is less churn for existing operators. Your call.
Q2 —
data/seed/location. Issue body says "either moves into example workspaces or stays where it is and the new helper accepts an explicit path." Thefrom_dir(client, dir)signature already takes an explicit path, so I'd leave/tmp/hero_osis_117/data/seed/where it is and letfrom_dirconsume it. OK?Q3 —
# Recipe [rootobject]comment in recipes.oschema. The marker is currently a comment (# Recipe [rootobject]), so post-#108 the type doesn't register as a rootobject — which means no CRUD trait emission, which means the recipe SDK round-trip in §3 of the acceptance criteria currently can't run at all. Fix this as part of #117 (uncomment soRecipeandCollectionare real rootobjects again), or split into a separate prereq issue?Q4 — drop
_new_from_otoml/_new_from_jsonfrom the generated OSIS layer entirely? They're currently public on every domain handler (rust_osis.rs:461-484). After the seeder takes over, they have no callers. Confirm I can delete the emission, or do you want them kept as a convenience API?Q5 —
From<Recipe> for RecipeInputvsFrom<&Recipe> for RecipeInput. The former is wasteful when callers already own the row. The latter requires.clone()per field in the impl. I'll emitFrom<&Recipe>(cheaper at the call site for "load row, mutate one field, set"), but happy to do both if you'd prefer.Standing by for sign-off before I start cutting code. Worktrees are already prepared.
Scope addition — fold in: unified service spin-up
@ excellent audit. Wanted to fold one more dimension of "single source of truth" into the issue before you cut code — the user signed off on this as part of #117 rather than as a separate issue.
Problem
Today the scaffolded
<service>_servercrate is bin-only. The foreground bootstrap (build OSIS handler →rpc2_adapter::module_for→ServerBuilder::new().serve_http()→ctrl_c().await→shutdown) lives insidemain.rs(~80 lines, seeexamples/recipe_server/crates/hero_recipes_server/src/main.rs:30-140).Consequences:
hero_procexecs.benches/runner.rs.tests/) — needs in-process spin-up insidetests/src/lib.rs::spin_up_service().crates/generator/src/generate/e2e.rs→examples/rust/<domain>/client_server.rs) — already has its own custom block.Three copies of the same logic + a fourth in
main.rs, all drifting independently. Same problem the type unification fixes for data shapes, applied to lifecycle.Resolution
Promote the scaffolded server crate from
bin-only tolib+bin. Extract the foreground bootstrap into a public library function consumed by all four call sites.New
crates/<service>_server/src/lib.rs(scaffolded once + codegen for theOsisXxxreferences)main.rsshrinks to the lifecycle shellTests / benches / examples — three-line wrapper
Same pattern in
benches/runner.rs(#113) and in the runnableexamples/rust/<domain>/client_server.rsemitter — none of them redefine the bootstrap.Cargo manifest delta
The scaffolded
crates/<service>_server/Cargo.tomlgains a[lib]section pointing atsrc/lib.rsalongside the existing[[bin]]block. Thetempfiledependency is dev-only (forServerConfig::for_test); production builds don't pull it in. Actually — sincefor_testis on a non-test code path today, it needstempfileas a regular dep gated behind atest-supportfeature, OR we movefor_testintotests/src/lib.rsand have it constructServerConfigdirectly. The latter is cleaner; happy with either.Scaffolder changes
crates/generator/src/build/scaffold.rs::generate_server_crate(or equivalent) needs to:src/lib.rs(new) andsrc/main.rs(slimmer) instead ofsrc/main.rsonly.[lib]to the Cargo.toml.lib.rs(just like it already is formain.rs).The per-domain codegen that goes into
<server>/src/<domain>/generated/is unchanged — those keep being regenerated freely.Acceptance additions
hero_recipes_serveris alib + bincrate.cargo doc -p hero_recipes_servershowsServerConfig,run,RunningServeras public items.main.rsis refactored down to ~25 lines, callingfrom_environment+run.lab service hero_recipes --startcontinues to work unchanged — the--start/--stop/ foreground modes still live inmain.rs, only the foreground body delegates torun().run()via a 3-line wrapper. No duplicatedServerBuilderblock anywhere.Sequencing note
This addition blocks #115 alongside the rest of #117 — #115's
spin_up_service()is the canonical first consumer ofrun(). #113's benchrunner.rsand the runnable example emitter follow.No new open questions from this addition — happy to defer to the answers on Q1–Q5 for everything else.
tests/) #115Correction — supersedes my earlier bootstrap-unify comment
The user pushed back (correctly) on my prior scope-addition comment. Two specific corrections — retracting the parts of that comment they invalidate:
Retracted: "promote
<service>_servertolib + bin"Wrong.
<service>_serverstays bin-only. Three reasons I had missed:service_base!()hard-codesinclude_str!("../service.toml")— only resolves correctly fromsrc/main.rs. Embedding from alib.rswould either duplicate the embed or require a different macro shape.lab infocheck(source:hero_skills/crates/lab/src/builder/infocheck.rs:280-332) auditssrc/main.rsspecifically. It requires three substring matches there —service_base!,validate_service_toml,handle_info_flag— and forbidsfn print_info_json/fn print_info_toml. Splitting startup logic into a siblinglib.rswould hide the contract behind a re-export the auditor doesn't recognize.hero_proc/lab service --startchain is binary-centric:<bin> --info --json,<bin> --start, foreground exec byhero_proc. The bin shape is the lifecycle contract.Retracted:
ServerConfig::from_environmentreaching pastprepare_socketsWrong. The canonical
herolib_core::base::prepare_socketsdoes stale-socket cleanup + live-conflict detection + parent-dir creation; itsVec<SocketPrep>return is the only blessed socket-path source. Myfrom_environmentwas rebuilding that logic by hand. Skippingprepare_socketsbreaks the contractlab service --startdepends on (seehero_service_check_fix.md§0a runtime checks 1–4).Corrected factoring
The canonical foreground bootstrap belongs in
hero_rpc_osis(already ownsrpc2_adapter::module_for, already depends onhero_rpc2, already a shared dep across every scaffolded service). New helper module:main.rsafter the change — auditor-cleanlab infocheckaudit (verified againstinfocheck.rs:280-332):service_base!— ✓ (line 1 ofmain.rs).validate_service_toml— ✓.handle_info_flag— ✓.fn print_info_json— ✓ (none).fn print_info_toml— ✓ (none).--info --jsonroundtrip — ✓ (unchanged from today).print_startup_banner/prepare_sockets— the auditor does NOT require these to appear inmain.rsby name (the skill markdown says "must use" but the source-level check has no grep for them — they just have to be called somewhere in the binary's call graph for the runtime checks to pass, which they are, viarun()).Tests / benches / examples — three-line wrapper
Same pattern in
benches/runner.rs(#113) and in the runnable example emitter — none of them redefine the bootstrap or skip the herolib_base layer.Cargo manifest delta
crates/osis/Cargo.toml(thehero_rpc_osiscrate) — gainstempfile = "3"as an optional dep behind atest-supportfeature, so production binaries don't pull it in:run_for_testis gated#[cfg(feature = "test-support")]. The scaffoldedtests/Cargo.toml(#115) andbenches/Cargo.toml(#113) enable the feature; production<service>_serverdoesn't.crates/<service>_server/Cargo.toml— unchanged shape (no[lib]section, staysbin-only).main.rstemplate — slimmer per the snippet above.Acceptance additions (corrected)
hero_rpc_osis::rpc::server::{run, run_for_test, RunningServer}are public.main.rsis refactored down to ~25 lines, callingrunafter the lifecycle CLI dispatch.lab service hero_recipes --install --startcontinues to work unchanged — runtime checks 1–4 inhero_service_check_fix.md§0a all pass (banner appears, sockets prep, stale-recovery, live-conflict).lab infocheckexits 0 with0 crate(s) with issues.run_for_test()via a 3-line wrapper. No duplicatedServerBuilderblock anywhere.<service>_serverCargo.toml has no[lib]section.Sequencing
Same as before — this addition blocks #115 alongside the rest of #117; #113 follows.
No new open questions from this correction; still deferring to Q1–Q5 on the rest.
tests/) #115@timur wrote in #117 (comment):
ok for otime. q1: a, q2 ok, q3: fix as part. q4: confirm, dont keep it. q5: reference makes sense
Landed.
PRs (squash-merge order: hero_lib → hero_rpc → hero_osis → hero_skills)
otoml: gate OTime::now() for wasm32 (hero_rpc#117)— lhumina_code/hero_lib#144Generator: unify SDK ↔ server types and seeding (single source of truth) (#117)— #118hero_osis: drop hero_osis_seed binary + --seed-dir startup hook (hero_rpc#117)— lhumina_code/hero_osis#65hero_service_scaffold: link ADR 002 (hero_rpc#117)— lhumina_code/hero_skills#283Acceptance verification
RecipesClient::recipe_new(client, None, RecipeInput::default()).awaitreturns a SidRecipesClient::recipe_set(client, None, sid, RecipeInput { name: "x".into(), ..Default::default() }).awaitupdates the rowRecipesClient::recipe_get(client, None, sid).awaitreturns a Recipe whosecreated_atdeserializes successfullyhero_recipes_sdk::seed::random(&client, 10, 0xDEAD_BEEF).awaitpopulates 10 recordscargo check --target wasm32-unknown-unknown -p hero_recipes_sdkhero_osis_seedbinary + crate path entries gone01_walkthrough.rs(nowexamples/walkthrough/src/main.rs) exercises a realrecipe_new(RecipeInput{...})round-trip; OTime caveat block deletedWhat the four PRs change together
OTime::now()gated tocfg(not(target_arch = "wasm32")). Everything else inherolib_otomlwas already WASM-safe; that one method was the entire gate surface (PR description has the full audit).OTime(pub String)newtype goes away.<Name>emits a sibling<Name>Input(user-fields only) plusimpl From<&<Name>>for(&row).into()round-tripping._new(input) → sidand_set(sid, input) → ()split across the wire trait, the OSIS handler API, and the JSON-RPC dispatcher.crates/osis/src/seed/is deleted; the typed SDK getsseed::{blank, random, from_dir}emitted alongside the trait file, feature-gatedseed = ["dep:rand", "dep:rand_chacha", ...].hero_rpc_osis::rpc::bootstrap::{run, run_for_test, RunningServer}collapses the per-service spin-up loop into one canonical path; recipe_server'smain.rsshrinks accordingly.hero_osis_seedbinary +--seed-dirstartup hook + docs/SEEDING.md gone. Tests/scripts updated;tests/e2e_seed.rsmarked#[ignore]pending the workspace-roottests/crate in hero_rpc#115.hero_service_scaffoldskill now links ADR 002.Out of scope (already noted in PR descriptions)
created_at: u64— assumed empty / dev-only at rollover.Closing the issue.