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Module format v2 adds byte values, message inputs with u32 and bytes-tail
fields, one keyed byte collection, replies and require. The verifier checks
every operand's type and the context each operation may run in, and allows
branches and joins only at an empty stack, so typed values never merge.
A message event opens its key's working version through a PureData host,
conflicts early on a stale base revision, runs its handlers, and commits
only if they succeed; a failed event leaves documents and states unchanged.
Replies lend payload or document extents, and a document reply is copied
before commit. pure_tree_data implements the host on tree store drafts, and
pure-edit-module offers the document CLI contract of pure-edit from a module.
test-module adds document semantics on an in-memory host (not found, create,
conflict before bounds, limits, short payloads, busy commits, stable replies,
require, state rollback), typed verifier rules, and 20,000 damaged message
modules run safely under ASan/UBSan.
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Pure now owns the format its toolchains target, as the JVM owns class files.
A v1 module carries f64 states, key inputs, atomic event handlers and pure
views. pure_module_load checks sizes, names, keys, operands, forward-only
branches, reachability and stack heights at every join before anything runs,
so execution needs no stack checks and each event is bounded by its handler
length. PureApp runs events on a pending copy and replaces modules keeping
states by name, without allocation. Semantics match the workbench engine,
including IEEE minimum/maximum on signed zeros.
test-module covers behaviour, atomic faults, 26 rejection checks and 20,000
damaged modules under ASan/UBSan; pure-run is a JSON test host.
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