`protocolswitch`

JK2MV

Needs review. The inventory/provenance evidence is recorded, but some behavior, options, or attribution still lacks a direct user-facing source.

Engine-managed. The game maintains this value itself, so it is not a setting to change by hand: it is read-only after registration (CVAR_ROM); it is internal UI/engine state, hidden from every cvar listing (CVAR_INTERNAL).

Sets protocol based on server info response

At a glance

Field	Value
Default	`0`
Value type	`enum`
Restart	No latch flag is registered.
Manually settable	No; the game writes this value.
Cheat protected	No
Network scope	`client-only`: Local to the client/UI/renderer.
Category	Engine & diagnostics
Module	`engine-client`
Renderer	All / not renderer-specific
Derivation	`documented`
Confidence	`medium`
Added	2018-04-26 in `a983fa494` needs review (how to compare this against your build)
In-game xdocs	No
In-game menu	No

Values

Value	Meaning	Evidence
`0`	Selects the code path tested for value 0.	codemp/client/cl_main.cpp:1785
`2`	Selects the code path tested for value 2.	codemp/client/cl_main.cpp:337

Flags

CVAR_INTERNAL: internal UI/engine state
CVAR_NORESTART: preserved across cvar restart
CVAR_PROTECTED: protected from unsafe remote changes
CVAR_ROM: read-only after registration

Provenance

Origin: JK2MV

TaystJK integration evidence: a983fa494fee
Attribution method: squash-feature-group-explicit-credit
Attribution confidence: medium
Notes: The earliest authored/submitted introduction is shared by eternaljk, taystjk, japro, vulkan; fork-lineage order selects eternaljk. The identifier’s single-prefix squash feature group explicitly credits jk2mv.

Dated project introductions

Authored dates come from the exact registration’s first content commit, PR dates identify when work was proposed to each project, and integration dates come from each first-parent mainline. A project merging first does not override earlier upstream authorship or submission.

Project	Authored	PR opened	Integrated	Commit	Relationship
EternalJK	`2018-04-26`	—	`2018-04-26`	`a983fa494fee`	Other project appearance
TaystJK	`2018-04-26`	—	`2018-04-26`	`a983fa494fee`	Other project appearance
jaPRO	`2018-04-26`	—	`2018-04-26`	`a983fa494fee`	Other project appearance
Vulkan	`2018-04-26`	—	`2018-04-26`	`a983fa494fee`	Other project appearance
NewJK / NewMod	`2018-04-26`	—	`2020-04-02`	`007750b49b3b`	Other project appearance

Later changes

These commits occur after the ultimate-origin introduction on TaystJK’s inherited first-parent lineage. Registration evidence is exact; behavior evidence requires a changed bound cvar reference or a changed registered command-handler hunk.

Date	Change source	Commit / subject	Evidence	Confidence
`2018-05-16`	EternalJK	`5df1fad1b1f6` Merge remote-tracking branch ‘bucky/master’	Changed registration, default, flags, module, renderer scope, handler, or gating. `codemp/client/cl_main.cpp`	`medium`
`2018-05-24`	EternalJK	`097a0d05fa4e` Merge remote-tracking branch ‘bucky/master’	Changed an exact bound cvar-variable reference. `codemp/client/cl_main.cpp`	`medium`
`2018-07-22`	EternalJK	`fae0fd307416` Merge branch ‘feature/update-game’ into develop	Changed an exact bound cvar-variable reference. `codemp/client/cl_main.cpp`	`medium`
`2018-10-21`	EternalJK	`952c06842ed0` Remove custom widescreen console background, now fixed with con_ratioFix	Changed an exact bound cvar-variable reference. `codemp/client/cl_main.cpp`	`medium`
`2018-11-28`	EternalJK	`418f3e1fcc29` Check engine support for new renderfx flags, use old behavior if necessary	Changed an exact bound cvar-variable reference. `codemp/cgame/cg_main.c`	`medium`
`2026-08-13`	TaystJK	`5802c999168d` · PR #366 Merge pull request #366 from taysta/pure-fix	Changed an exact bound cvar-variable reference. `codemp/qcommon/files.cpp`	`high`

Evidence

registration: codemp/client/cl_main.cpp:3337 (Cvar_Get)
behavior: codemp/client/cl_main.cpp:337
behavior: codemp/client/cl_main.cpp:1785
behavior: codemp/client/cl_main.cpp:1796
behavior: codemp/qcommon/files.cpp:4170
behavior: codemp/cgame/cg_main.c:3174

Generated from source commit c722804317d7 on 2026-09-28. Anything merged after that is not reflected here.