A module is addressed by name and command string, and nothing else.
Typed API access handed a caller a pointer into the callee's function
table, which meant compiling against that module's struct layout — a
build-time dependency between modules that the design does not permit.
Removing it also removes the manifest, the table magic constant, and
the table size field, which existed only to describe and validate
those tables.
Load validation is now three steps: reserved contract symbols resolve,
the minimum-version handshake passes, and the version and description
probes return well-formed values. The contract is four reserved
symbols, and a module's interface is the command vocabulary it
documents.
Documentation is brought in line, and artifacts are named exactly:
libdpm-core.so for the library, <dpm/core.h> for the header, the dpm
binary for the command-line tool.
Module APIs and the library's exported ABI are versioned and retired
deliberately: a break ships as a new table version or a new symbol
version node, and consumers judge the versions they are handed.
Document src/libdpm-core.map — what it pins, what belongs in it, and
how a generation is retired — and declare DPM_CORE_0.1 as the shape
the next retired node takes.
dpm_require no longer takes a minimum version and applies no version
criterion of its own. A handle now means the module is valid, not that
it suits the caller. dpm_module_info_of is added alongside it, reporting
the name, version, description, and minimum-libdpm-core version read at
load, so a consuming module can judge a dependency's version for itself.
The one rule still enforced is the minimum-version handshake, where
libdpm-core is the host and refuses a module that demands a newer library
than the one running.
dpm_module_info_of joins the version script, so the exported surface is
now fourteen symbols under DPM_CORE_1.0.
Separately, the bare word "core" is gone from prose everywhere. It named
both the command-line tool and the library, so every use forced the
reader to guess which. Text now says "the dpm binary" or "libdpm-core".
Identifiers keep their spelling: libdpm-core, core.h, core.conf, the
"core" configuration namespace, dpm_core_version, core_min, DPM_CORE_1.0,
the dpmcore namespace, test_core, core_api.
Three user-visible strings changed with it: the load-refusal message now
reads "requires libdpm-core >= X, running libdpm-core is Y — update
libdpm-core", and the info module's description and help text name the
library. The test asserting on the refusal text was updated to match.
DESIGN.md's terminology line no longer defines "DPM Core" as the CLI,
which was the source of the ambiguity. OVERVIEW.md is restructured around
the three layers a reader meets DPM at — user, developer, filesystem —
so a code-level symbol never appears without saying whose layer it is.
MODULES.md describes the bundled info module as testing and demonstrating
full DPM system functionality rather than as a reference implementation.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
