Sequencing per the recorded plan: suite_tcl90 arc closed (G-096/G-098
achieved, punk905 promoted 2026-07-21), so the driver-shape work starts
now, ahead of the 8.6 arc (G-099 born onto the chosen shape).
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
# G-102 buildsuite bootstrap without a pre-existing tclsh: zig-driver hybrid
Status: proposed
Status: active
Scope: src/buildsuites/suite_tcl90/ (driver split: zig-layer fetch/generate/compile + suite-tclsh-run Tcl phases; sources.config -> zon-shaped manifest migration), src/buildsuites/ (the pattern future suites fork - interplay with G-099), bin/tools/ (pinned zig acquisition per the consent-gated mechanism), src/scriptapps/bin/ punk-getzig (acquisition layer, unchanged in role)
Goal: a buildsuite is drivable end-to-end with only the pinned zig toolchain present - no pre-existing tclsh anywhere in the chain. Pre-tclsh phases (source fetch, configure-product generation, compile) move into the zig build layer, with sources declared in a content-hashed declarative manifest (build.zig.zon or a zon-shaped equivalent) that keeps the copy-and-tweak retargeting property; post-tclsh phases (tcllib/tklib installers, critcl accelerators, the parsed-totals test gate, smokes) remain Tcl scripts executed by the FRESHLY BUILT suite tclsh as build steps - Tcl stays the tool exactly where a tclsh is guaranteed to exist because the suite just built it. The plain-tclsh suite.tcl remains as an ergonomic dev driver during transition (or is reduced to a thin documented wrapper).
Acceptance: from a clean checkout plus the pinned zig (acquired via the consent-gated download mechanism or self-built), a documented zig invocation performs the whole pipeline in an environment where no pre-existing tclsh is resolvable (PATH-scrubbed demonstration recorded in this file): fetch/stage sources per the declarative manifest (content-integrity pins for zig-fetched trees; the fossil-checkout flow retained as a documented dev alternative for live-branch work), generate the configure-products, build the runtime, then run the post-tclsh phases under the suite-built shell - tcllib install with tcllibc accelerators via critcl, tklib, tk - and the expected-failure-baselined test gate, with results matching the suite.tcl-driven equivalents; the manifest is the documented tweak surface and copied suite trees remain isolated (G-096 copy-and-tweak property preserved); the recipe pins the zig version it is written against (API-churn mitigation - the 0.14->0.16 migration cost is the recorded precedent); the bash+powershell polyglot alternative for this layer is recorded as considered and rejected, with polyglot craft remaining the ACQUISITION layer's mechanism (punk-getzig/getpunk first-contact story).
